diff --git a/bot.py b/bot.py
index 19ad80025..48517fe24 100644
--- a/bot.py
+++ b/bot.py
@@ -12,8 +12,6 @@ from loguru import logger
 from nonebot.adapters.onebot.v11 import Adapter
 import platform
 
-from src.common.database import Database
-
 # 获取没有加载env时的环境变量
 env_mask = {key: os.getenv(key) for key in os.environ}
 
@@ -111,18 +109,6 @@ def load_env():
         logger.error(f"ENVIRONMENT 配置错误，请检查 .env 文件中的 ENVIRONMENT 变量及对应 .env.{env} 是否存在")
         RuntimeError(f"ENVIRONMENT 配置错误，请检查 .env 文件中的 ENVIRONMENT 变量及对应 .env.{env} 是否存在")
 
-def init_database():
-    Database.initialize(
-        uri=os.getenv("MONGODB_URI"),
-        host=os.getenv("MONGODB_HOST", "127.0.0.1"),
-        port=int(os.getenv("MONGODB_PORT", "27017")),
-        db_name=os.getenv("DATABASE_NAME", "MegBot"),
-        username=os.getenv("MONGODB_USERNAME"),
-        password=os.getenv("MONGODB_PASSWORD"),
-        auth_source=os.getenv("MONGODB_AUTH_SOURCE"),
-    )
-    
-
 def load_logger():
     logger.remove()  # 移除默认配置
     if os.getenv("ENVIRONMENT") == "dev":
@@ -223,7 +209,6 @@ def raw_main():
     init_config()
     init_env()
     load_env()
-    init_database() # 加载完成环境后初始化database
     load_logger()
 
     env_config = {key: os.getenv(key) for key in os.environ}
diff --git a/src/common/database.py b/src/common/database.py
index c6cead225..ca73dc468 100644
--- a/src/common/database.py
+++ b/src/common/database.py
@@ -1,73 +1,53 @@
-from typing import Optional
+import os
+from typing import cast
 from pymongo import MongoClient
-from pymongo.database import Database as MongoDatabase
+from pymongo.database import Database
 
-class Database:
-    _instance: Optional["Database"] = None
-    
-    def __init__(
-        self,
-        host: str,
-        port: int,
-        db_name: str,
-        username: Optional[str] = None,
-        password: Optional[str] = None,
-        auth_source: Optional[str] = None,
-        uri: Optional[str] = None,
-    ):
-        if uri and uri.startswith("mongodb://"):
-            # 优先使用URI连接
-            self.client = MongoClient(uri)
-        elif username and password:
-            # 如果有用户名和密码，使用认证连接
-            self.client = MongoClient(
-                host, port, username=username, password=password, authSource=auth_source
-            )
-        else:
-            # 否则使用无认证连接
-            self.client = MongoClient(host, port)
-        self.db: MongoDatabase = self.client[db_name]
-        
-    @classmethod
-    def initialize(
-        cls,
-        host: str,
-        port: int,
-        db_name: str,
-        username: Optional[str] = None,
-        password: Optional[str] = None,
-        auth_source: Optional[str] = None,
-        uri: Optional[str] = None,
-    ) -> MongoDatabase:
-        if cls._instance is None:
-            cls._instance = cls(
-                host, port, db_name, username, password, auth_source, uri
-            )
-        return cls._instance.db
-        
-    @classmethod
-    def get_instance(cls) -> MongoDatabase:
-        if cls._instance is None:
-            raise RuntimeError("Database not initialized")
-        return cls._instance.db
+_client = None
+_db = None
 
 
-    #测试用
-    
-    def get_random_group_messages(self, group_id: str, limit: int = 5):
-        # 先随机获取一条消息
-        random_message = list(self.db.messages.aggregate([
-            {"$match": {"group_id": group_id}},
-            {"$sample": {"size": 1}}
-        ]))[0]
-        
-        # 获取该消息之后的消息
-        subsequent_messages = list(self.db.messages.find({
-            "group_id": group_id,
-            "time": {"$gt": random_message["time"]}
-        }).sort("time", 1).limit(limit))
-        
-        # 将随机消息和后续消息合并
-        messages = [random_message] + subsequent_messages
-        
-        return messages
\ No newline at end of file
+def __create_database_instance():
+    uri = os.getenv("MONGODB_URI")
+    host = os.getenv("MONGODB_HOST", "127.0.0.1")
+    port = int(os.getenv("MONGODB_PORT", "27017"))
+    db_name = os.getenv("DATABASE_NAME", "MegBot")
+    username = os.getenv("MONGODB_USERNAME")
+    password = os.getenv("MONGODB_PASSWORD")
+    auth_source = os.getenv("MONGODB_AUTH_SOURCE")
+
+    if uri and uri.startswith("mongodb://"):
+        # 优先使用URI连接
+        return MongoClient(uri)
+
+    if username and password:
+        # 如果有用户名和密码，使用认证连接
+        return MongoClient(
+            host, port, username=username, password=password, authSource=auth_source
+        )
+
+    # 否则使用无认证连接
+    return MongoClient(host, port)
+
+
+def get_db():
+    """获取数据库连接实例，延迟初始化。"""
+    global _client, _db
+    if _client is None:
+        _client = __create_database_instance()
+        _db = _client[os.getenv("DATABASE_NAME", "MegBot")]
+    return _db
+
+
+class DBWrapper:
+    """数据库代理类，保持接口兼容性同时实现懒加载。"""
+
+    def __getattr__(self, name):
+        return getattr(get_db(), name)
+
+    def __getitem__(self, key):
+        return get_db()[key]
+
+
+# 全局数据库访问点
+db: Database = DBWrapper()
diff --git a/src/gui/reasoning_gui.py b/src/gui/reasoning_gui.py
index 84b95adaf..e79f8f91f 100644
--- a/src/gui/reasoning_gui.py
+++ b/src/gui/reasoning_gui.py
@@ -7,7 +7,7 @@ from datetime import datetime
 from typing import Dict, List
 from loguru import logger
 from typing import Optional
-from ..common.database import Database
+from ..common.database import db
 
 import customtkinter as ctk
 from dotenv import load_dotenv
@@ -44,28 +44,6 @@ class ReasoningGUI:
         self.root.geometry('800x600')
         self.root.protocol("WM_DELETE_WINDOW", self._on_closing)
 
-        # 初始化数据库连接
-        try:
-            self.db = Database.get_instance()
-            logger.success("数据库连接成功")
-        except RuntimeError:
-            logger.warning("数据库未初始化，正在尝试初始化...")
-            try:
-                Database.initialize(
-                    uri=os.getenv("MONGODB_URI"),
-                    host=os.getenv("MONGODB_HOST", "127.0.0.1"),
-                    port=int(os.getenv("MONGODB_PORT", "27017")),
-                    db_name=os.getenv("DATABASE_NAME", "MegBot"),
-                    username=os.getenv("MONGODB_USERNAME"),
-                    password=os.getenv("MONGODB_PASSWORD"),
-                    auth_source=os.getenv("MONGODB_AUTH_SOURCE"),
-                )
-                self.db = Database.get_instance()
-                logger.success("数据库初始化成功")
-            except Exception:
-                logger.exception("数据库初始化失败")
-                sys.exit(1)
-
         # 存储群组数据
         self.group_data: Dict[str, List[dict]] = {}
 
@@ -264,11 +242,11 @@ class ReasoningGUI:
                 logger.debug(f"查询条件: {query}")
 
                 # 先获取一条记录检查时间格式
-                sample = self.db.reasoning_logs.find_one()
+                sample = db.reasoning_logs.find_one()
                 if sample:
                     logger.debug(f"样本记录时间格式: {type(sample['time'])} 值: {sample['time']}")
 
-                cursor = self.db.reasoning_logs.find(query).sort("time", -1)
+                cursor = db.reasoning_logs.find(query).sort("time", -1)
                 new_data = {}
                 total_count = 0
 
@@ -333,17 +311,6 @@ class ReasoningGUI:
 
 
 def main():
-    """主函数"""
-    Database.initialize(
-        uri=os.getenv("MONGODB_URI"),
-        host=os.getenv("MONGODB_HOST", "127.0.0.1"),
-        port=int(os.getenv("MONGODB_PORT", "27017")),
-        db_name=os.getenv("DATABASE_NAME", "MegBot"),
-        username=os.getenv("MONGODB_USERNAME"),
-        password=os.getenv("MONGODB_PASSWORD"),
-        auth_source=os.getenv("MONGODB_AUTH_SOURCE"),
-    )
-
     app = ReasoningGUI()
     app.run()
 
diff --git a/src/plugins/chat/__init__.py b/src/plugins/chat/__init__.py
index 1c6bf3f35..d7a7bd7e4 100644
--- a/src/plugins/chat/__init__.py
+++ b/src/plugins/chat/__init__.py
@@ -7,7 +7,6 @@ from nonebot import get_driver, on_message, require
 from nonebot.adapters.onebot.v11 import Bot, GroupMessageEvent, Message, MessageSegment,MessageEvent
 from nonebot.typing import T_State
 
-from ...common.database import Database
 from ..moods.moods import MoodManager  # 导入情绪管理器
 from ..schedule.schedule_generator import bot_schedule
 from ..utils.statistic import LLMStatistics
diff --git a/src/plugins/chat/chat_stream.py b/src/plugins/chat/chat_stream.py
index 3ccd03f81..60b0af493 100644
--- a/src/plugins/chat/chat_stream.py
+++ b/src/plugins/chat/chat_stream.py
@@ -6,7 +6,7 @@ from typing import Dict, Optional
 
 from loguru import logger
 
-from ...common.database import Database
+from ...common.database import db
 from .message_base import GroupInfo, UserInfo
 
 
@@ -83,7 +83,6 @@ class ChatManager:
     def __init__(self):
         if not self._initialized:
             self.streams: Dict[str, ChatStream] = {}  # stream_id -> ChatStream
-            self.db = Database.get_instance()
             self._ensure_collection()
             self._initialized = True
             # 在事件循环中启动初始化
@@ -111,11 +110,11 @@ class ChatManager:
 
     def _ensure_collection(self):
         """确保数据库集合存在并创建索引"""
-        if "chat_streams" not in self.db.list_collection_names():
-            self.db.create_collection("chat_streams")
+        if "chat_streams" not in db.list_collection_names():
+            db.create_collection("chat_streams")
             # 创建索引
-            self.db.chat_streams.create_index([("stream_id", 1)], unique=True)
-            self.db.chat_streams.create_index(
+            db.chat_streams.create_index([("stream_id", 1)], unique=True)
+            db.chat_streams.create_index(
                 [("platform", 1), ("user_info.user_id", 1), ("group_info.group_id", 1)]
             )
 
@@ -168,7 +167,7 @@ class ChatManager:
             return stream
 
         # 检查数据库中是否存在
-        data = self.db.chat_streams.find_one({"stream_id": stream_id})
+        data = db.chat_streams.find_one({"stream_id": stream_id})
         if data:
             stream = ChatStream.from_dict(data)
             # 更新用户信息和群组信息
@@ -204,7 +203,7 @@ class ChatManager:
     async def _save_stream(self, stream: ChatStream):
         """保存聊天流到数据库"""
         if not stream.saved:
-            self.db.chat_streams.update_one(
+            db.chat_streams.update_one(
                 {"stream_id": stream.stream_id}, {"$set": stream.to_dict()}, upsert=True
             )
             stream.saved = True
@@ -216,7 +215,7 @@ class ChatManager:
 
     async def load_all_streams(self):
         """从数据库加载所有聊天流"""
-        all_streams = self.db.chat_streams.find({})
+        all_streams = db.chat_streams.find({})
         for data in all_streams:
             stream = ChatStream.from_dict(data)
             self.streams[stream.stream_id] = stream
diff --git a/src/plugins/chat/emoji_manager.py b/src/plugins/chat/emoji_manager.py
index 1c8a07699..822eda009 100644
--- a/src/plugins/chat/emoji_manager.py
+++ b/src/plugins/chat/emoji_manager.py
@@ -12,7 +12,7 @@ import io
 from loguru import logger
 from nonebot import get_driver
 
-from ...common.database import Database
+from ...common.database import db
 from ..chat.config import global_config
 from ..chat.utils import get_embedding
 from ..chat.utils_image import ImageManager, image_path_to_base64
@@ -30,12 +30,10 @@ class EmojiManager:
     def __new__(cls):
         if cls._instance is None:
             cls._instance = super().__new__(cls)
-            cls._instance.db = None
             cls._instance._initialized = False
         return cls._instance
 
     def __init__(self):
-        self.db = Database.get_instance()
         self._scan_task = None
         self.vlm = LLM_request(model=global_config.vlm, temperature=0.3, max_tokens=1000)
         self.llm_emotion_judge = LLM_request(model=global_config.llm_emotion_judge, max_tokens=60,
@@ -50,7 +48,6 @@ class EmojiManager:
         """初始化数据库连接和表情目录"""
         if not self._initialized:
             try:
-                self.db = Database.get_instance()
                 self._ensure_emoji_collection()
                 self._ensure_emoji_dir()
                 self._initialized = True
@@ -78,16 +75,16 @@ class EmojiManager:
         
         没有索引的话,数据库每次查询都需要扫描全部数据,建立索引后可以大大提高查询效率。
         """
-        if 'emoji' not in self.db.list_collection_names():
-            self.db.create_collection('emoji')
-            self.db.emoji.create_index([('embedding', '2dsphere')])
-            self.db.emoji.create_index([('filename', 1)], unique=True)
+        if 'emoji' not in db.list_collection_names():
+            db.create_collection('emoji')
+            db.emoji.create_index([('embedding', '2dsphere')])
+            db.emoji.create_index([('filename', 1)], unique=True)
 
     def record_usage(self, emoji_id: str):
         """记录表情使用次数"""
         try:
             self._ensure_db()
-            self.db.emoji.update_one(
+            db.emoji.update_one(
                 {'_id': emoji_id},
                 {'$inc': {'usage_count': 1}}
             )
@@ -121,7 +118,7 @@ class EmojiManager:
 
             try:
                 # 获取所有表情包
-                all_emojis = list(self.db.emoji.find({}, {'_id': 1, 'path': 1, 'embedding': 1, 'description': 1}))
+                all_emojis = list(db.emoji.find({}, {'_id': 1, 'path': 1, 'embedding': 1, 'description': 1}))
 
                 if not all_emojis:
                     logger.warning("数据库中没有任何表情包")
@@ -159,7 +156,7 @@ class EmojiManager:
                 
                 if selected_emoji and 'path' in selected_emoji:
                     # 更新使用次数
-                    self.db.emoji.update_one(
+                    db.emoji.update_one(
                         {'_id': selected_emoji['_id']},
                         {'$inc': {'usage_count': 1}}
                     )
@@ -241,14 +238,14 @@ class EmojiManager:
                 image_hash = hashlib.md5(image_bytes).hexdigest()
                 image_format = Image.open(io.BytesIO(image_bytes)).format.lower()
                 # 检查是否已经注册过
-                existing_emoji = self.db['emoji'].find_one({'filename': filename})
+                existing_emoji = db['emoji'].find_one({'filename': filename})
                 description = None
                 
                 if existing_emoji:
                     # 即使表情包已存在，也检查是否需要同步到images集合
                     description = existing_emoji.get('discription')
                     # 检查是否在images集合中存在
-                    existing_image = image_manager.db.images.find_one({'hash': image_hash})
+                    existing_image = db.images.find_one({'hash': image_hash})
                     if not existing_image:
                         # 同步到images集合
                         image_doc = {
@@ -258,7 +255,7 @@ class EmojiManager:
                             'description': description,
                             'timestamp': int(time.time())
                         }
-                        image_manager.db.images.update_one(
+                        db.images.update_one(
                             {'hash': image_hash},
                             {'$set': image_doc},
                             upsert=True
@@ -307,7 +304,7 @@ class EmojiManager:
                     }
                     
                     # 保存到emoji数据库
-                    self.db['emoji'].insert_one(emoji_record)
+                    db['emoji'].insert_one(emoji_record)
                     logger.success(f"注册新表情包: {filename}")
                     logger.info(f"描述: {description}")
 
@@ -320,7 +317,7 @@ class EmojiManager:
                         'description': description,
                         'timestamp': int(time.time())
                     }
-                    image_manager.db.images.update_one(
+                    db.images.update_one(
                         {'hash': image_hash},
                         {'$set': image_doc},
                         upsert=True
@@ -348,7 +345,7 @@ class EmojiManager:
         try:
             self._ensure_db()
             # 获取所有表情包记录
-            all_emojis = list(self.db.emoji.find())
+            all_emojis = list(db.emoji.find())
             removed_count = 0
             total_count = len(all_emojis)
 
@@ -356,13 +353,13 @@ class EmojiManager:
                 try:
                     if 'path' not in emoji:
                         logger.warning(f"发现无效记录（缺少path字段），ID: {emoji.get('_id', 'unknown')}")
-                        self.db.emoji.delete_one({'_id': emoji['_id']})
+                        db.emoji.delete_one({'_id': emoji['_id']})
                         removed_count += 1
                         continue
 
                     if 'embedding' not in emoji:
                         logger.warning(f"发现过时记录（缺少embedding字段），ID: {emoji.get('_id', 'unknown')}")
-                        self.db.emoji.delete_one({'_id': emoji['_id']})
+                        db.emoji.delete_one({'_id': emoji['_id']})
                         removed_count += 1
                         continue
 
@@ -370,7 +367,7 @@ class EmojiManager:
                     if not os.path.exists(emoji['path']):
                         logger.warning(f"表情包文件已被删除: {emoji['path']}")
                         # 从数据库中删除记录
-                        result = self.db.emoji.delete_one({'_id': emoji['_id']})
+                        result = db.emoji.delete_one({'_id': emoji['_id']})
                         if result.deleted_count > 0:
                             logger.debug(f"成功删除数据库记录: {emoji['_id']}")
                             removed_count += 1
@@ -381,7 +378,7 @@ class EmojiManager:
                     continue
 
             # 验证清理结果
-            remaining_count = self.db.emoji.count_documents({})
+            remaining_count = db.emoji.count_documents({})
             if removed_count > 0:
                 logger.success(f"已清理 {removed_count} 个失效的表情包记录")
                 logger.info(f"清理前总数: {total_count} | 清理后总数: {remaining_count}")
diff --git a/src/plugins/chat/llm_generator.py b/src/plugins/chat/llm_generator.py
index 84e1937b0..2e0c0eb1f 100644
--- a/src/plugins/chat/llm_generator.py
+++ b/src/plugins/chat/llm_generator.py
@@ -5,7 +5,7 @@ from typing import List, Optional, Tuple, Union
 from nonebot import get_driver
 from loguru import logger
 
-from ...common.database import Database
+from ...common.database import db
 from ..models.utils_model import LLM_request
 from .config import global_config
 from .message import MessageRecv, MessageThinking, Message
@@ -34,7 +34,6 @@ class ResponseGenerator:
         self.model_v25 = LLM_request(
             model=global_config.llm_normal_minor, temperature=0.7, max_tokens=1000
         )
-        self.db = Database.get_instance()
         self.current_model_type = "r1"  # 默认使用 R1
 
     async def generate_response(
@@ -154,7 +153,7 @@ class ResponseGenerator:
         reasoning_content: str,
     ):
         """保存对话记录到数据库"""
-        self.db.reasoning_logs.insert_one(
+        db.reasoning_logs.insert_one(
             {
                 "time": time.time(),
                 "chat_id": message.chat_stream.stream_id,
@@ -211,7 +210,6 @@ class ResponseGenerator:
 
 class InitiativeMessageGenerate:
     def __init__(self):
-        self.db = Database.get_instance()
         self.model_r1 = LLM_request(model=global_config.llm_reasoning, temperature=0.7)
         self.model_v3 = LLM_request(model=global_config.llm_normal, temperature=0.7)
         self.model_r1_distill = LLM_request(
diff --git a/src/plugins/chat/prompt_builder.py b/src/plugins/chat/prompt_builder.py
index c89bf3e07..a41ed51e2 100644
--- a/src/plugins/chat/prompt_builder.py
+++ b/src/plugins/chat/prompt_builder.py
@@ -3,7 +3,7 @@ import time
 from typing import Optional
 from loguru import logger
 
-from ...common.database import Database
+from ...common.database import db
 from ..memory_system.memory import hippocampus, memory_graph
 from ..moods.moods import MoodManager
 from ..schedule.schedule_generator import bot_schedule
@@ -16,7 +16,6 @@ class PromptBuilder:
     def __init__(self):
         self.prompt_built = ''
         self.activate_messages = ''
-        self.db = Database.get_instance()
 
 
 
@@ -76,7 +75,7 @@ class PromptBuilder:
         chat_in_group=True
         chat_talking_prompt = ''
         if stream_id:
-            chat_talking_prompt = get_recent_group_detailed_plain_text(self.db, stream_id, limit=global_config.MAX_CONTEXT_SIZE,combine = True)   
+            chat_talking_prompt = get_recent_group_detailed_plain_text(stream_id, limit=global_config.MAX_CONTEXT_SIZE,combine = True)   
             chat_stream=chat_manager.get_stream(stream_id)
             if chat_stream.group_info:
                 chat_talking_prompt = f"以下是群里正在聊天的内容：\n{chat_talking_prompt}"
@@ -199,7 +198,7 @@ class PromptBuilder:
 
         chat_talking_prompt = ''
         if group_id:
-            chat_talking_prompt = get_recent_group_detailed_plain_text(self.db, group_id,
+            chat_talking_prompt = get_recent_group_detailed_plain_text(group_id,
                                                                        limit=global_config.MAX_CONTEXT_SIZE,
                                                                        combine=True)
 
@@ -311,7 +310,7 @@ class PromptBuilder:
             {"$project": {"content": 1, "similarity": 1}}
         ]
 
-        results = list(self.db.knowledges.aggregate(pipeline))
+        results = list(db.knowledges.aggregate(pipeline))
         # print(f"\033[1;34m[调试]\033[0m获取知识库内容结果: {results}")
 
         if not results:
diff --git a/src/plugins/chat/relationship_manager.py b/src/plugins/chat/relationship_manager.py
index fbd8cec59..d604e6734 100644
--- a/src/plugins/chat/relationship_manager.py
+++ b/src/plugins/chat/relationship_manager.py
@@ -2,7 +2,7 @@ import asyncio
 from typing import Optional
 from loguru import logger
 
-from ...common.database import Database
+from ...common.database import db
 from .message_base import UserInfo
 from .chat_stream import ChatStream
 
@@ -167,14 +167,12 @@ class RelationshipManager:
 
     async def load_all_relationships(self):
         """加载所有关系对象"""
-        db = Database.get_instance()
         all_relationships = db.relationships.find({})
         for data in all_relationships:
             await self.load_relationship(data)
 
     async def _start_relationship_manager(self):
         """每5分钟自动保存一次关系数据"""
-        db = Database.get_instance()
         # 获取所有关系记录
         all_relationships = db.relationships.find({})
         # 依次加载每条记录
@@ -205,7 +203,6 @@ class RelationshipManager:
         age = relationship.age
         saved = relationship.saved
 
-        db = Database.get_instance()
         db.relationships.update_one(
             {'user_id': user_id, 'platform': platform},
             {'$set': {
diff --git a/src/plugins/chat/storage.py b/src/plugins/chat/storage.py
index ec155bbe9..ad6662f2b 100644
--- a/src/plugins/chat/storage.py
+++ b/src/plugins/chat/storage.py
@@ -1,15 +1,12 @@
 from typing import Optional, Union
 
-from ...common.database import Database
+from ...common.database import db
 from .message import MessageSending, MessageRecv
 from .chat_stream import ChatStream
 from loguru import logger
 
 
 class MessageStorage:
-    def __init__(self):
-        self.db = Database.get_instance()
-        
     async def store_message(self, message: Union[MessageSending, MessageRecv],chat_stream:ChatStream, topic: Optional[str] = None) -> None:
         """存储消息到数据库"""
         try:
@@ -23,7 +20,7 @@ class MessageStorage:
                     "detailed_plain_text": message.detailed_plain_text,
                     "topic": topic,
                 }
-            self.db.messages.insert_one(message_data)
+            db.messages.insert_one(message_data)
         except Exception:
             logger.exception("存储消息失败")
 
diff --git a/src/plugins/chat/utils.py b/src/plugins/chat/utils.py
index 0d1afd055..f28d0e192 100644
--- a/src/plugins/chat/utils.py
+++ b/src/plugins/chat/utils.py
@@ -16,6 +16,7 @@ from .message import MessageRecv,Message
 from .message_base import UserInfo
 from .chat_stream import ChatStream
 from ..moods.moods import MoodManager
+from ...common.database import db
 
 driver = get_driver()
 config = driver.config
@@ -76,11 +77,10 @@ def calculate_information_content(text):
     return entropy
 
 
-def get_cloest_chat_from_db(db, length: int, timestamp: str):
+def get_closest_chat_from_db(length: int, timestamp: str):
     """从数据库中获取最接近指定时间戳的聊天记录
     
     Args:
-        db: 数据库实例
         length: 要获取的消息数量
         timestamp: 时间戳
         
@@ -115,11 +115,10 @@ def get_cloest_chat_from_db(db, length: int, timestamp: str):
     return []
 
 
-async def get_recent_group_messages(db, chat_id:str, limit: int = 12) -> list:
+async def get_recent_group_messages(chat_id:str, limit: int = 12) -> list:
     """从数据库获取群组最近的消息记录
     
     Args:
-        db: Database实例
         group_id: 群组ID
         limit: 获取消息数量，默认12条
         
@@ -161,7 +160,7 @@ async def get_recent_group_messages(db, chat_id:str, limit: int = 12) -> list:
     return message_objects
 
 
-def get_recent_group_detailed_plain_text(db, chat_stream_id: int, limit: int = 12, combine=False):
+def get_recent_group_detailed_plain_text(chat_stream_id: int, limit: int = 12, combine=False):
     recent_messages = list(db.messages.find(
         {"chat_id": chat_stream_id},
         {
diff --git a/src/plugins/chat/utils_image.py b/src/plugins/chat/utils_image.py
index 94014b5b4..2154280de 100644
--- a/src/plugins/chat/utils_image.py
+++ b/src/plugins/chat/utils_image.py
@@ -10,7 +10,7 @@ import io
 from loguru import logger
 from nonebot import get_driver
 
-from ...common.database import Database
+from ...common.database import db
 from ..chat.config import global_config
 from ..models.utils_model import LLM_request
 driver = get_driver()
@@ -23,13 +23,11 @@ class ImageManager:
     def __new__(cls):
         if cls._instance is None:
             cls._instance = super().__new__(cls)
-            cls._instance.db = None
             cls._instance._initialized = False
         return cls._instance
     
     def __init__(self):
         if not self._initialized:
-            self.db = Database.get_instance()
             self._ensure_image_collection()
             self._ensure_description_collection()
             self._ensure_image_dir()
@@ -42,20 +40,20 @@ class ImageManager:
         
     def _ensure_image_collection(self):
         """确保images集合存在并创建索引"""
-        if 'images' not in self.db.list_collection_names():
-            self.db.create_collection('images')
+        if 'images' not in db.list_collection_names():
+            db.create_collection('images')
             # 创建索引
-            self.db.images.create_index([('hash', 1)], unique=True)
-            self.db.images.create_index([('url', 1)])
-            self.db.images.create_index([('path', 1)])
+            db.images.create_index([('hash', 1)], unique=True)
+            db.images.create_index([('url', 1)])
+            db.images.create_index([('path', 1)])
 
     def _ensure_description_collection(self):
         """确保image_descriptions集合存在并创建索引"""
-        if 'image_descriptions' not in self.db.list_collection_names():
-            self.db.create_collection('image_descriptions')
+        if 'image_descriptions' not in db.list_collection_names():
+            db.create_collection('image_descriptions')
             # 创建索引
-            self.db.image_descriptions.create_index([('hash', 1)], unique=True)
-            self.db.image_descriptions.create_index([('type', 1)])
+            db.image_descriptions.create_index([('hash', 1)], unique=True)
+            db.image_descriptions.create_index([('type', 1)])
 
     def _get_description_from_db(self, image_hash: str, description_type: str) -> Optional[str]:
         """从数据库获取图片描述
@@ -67,7 +65,7 @@ class ImageManager:
         Returns:
             Optional[str]: 描述文本，如果不存在则返回None
         """
-        result= self.db.image_descriptions.find_one({
+        result= db.image_descriptions.find_one({
             'hash': image_hash,
             'type': description_type
         })
@@ -81,7 +79,7 @@ class ImageManager:
             description: 描述文本
             description_type: 描述类型 ('emoji' 或 'image')
         """
-        self.db.image_descriptions.update_one(
+        db.image_descriptions.update_one(
             {'hash': image_hash, 'type': description_type},
             {
                 '$set': {
@@ -124,7 +122,7 @@ class ImageManager:
             image_format = Image.open(io.BytesIO(image_bytes)).format.lower()
             
             # 查重
-            existing = self.db.images.find_one({'hash': image_hash})
+            existing = db.images.find_one({'hash': image_hash})
             if existing:
                 return existing['path']
                 
@@ -145,7 +143,7 @@ class ImageManager:
                 'description': description,
                 'timestamp': timestamp
             }
-            self.db.images.insert_one(image_doc)
+            db.images.insert_one(image_doc)
             
             return file_path
             
@@ -162,7 +160,7 @@ class ImageManager:
         """
         try:
             # 先查找是否已存在
-            existing = self.db.images.find_one({'url': url})
+            existing = db.images.find_one({'url': url})
             if existing:
                 return existing['path']
                 
@@ -206,7 +204,7 @@ class ImageManager:
         Returns:
             bool: 是否存在
         """
-        return self.db.images.find_one({'url': url}) is not None
+        return db.images.find_one({'url': url}) is not None
         
     def check_hash_exists(self, image_data: Union[str, bytes], is_base64: bool = False) -> bool:
         """检查图像是否已存在
@@ -229,7 +227,7 @@ class ImageManager:
                     return False
                     
             image_hash = hashlib.md5(image_bytes).hexdigest()
-            return self.db.images.find_one({'hash': image_hash}) is not None
+            return db.images.find_one({'hash': image_hash}) is not None
             
         except Exception as e:
             logger.error(f"检查哈希失败: {str(e)}")
@@ -273,7 +271,7 @@ class ImageManager:
                         'description': description,
                         'timestamp': timestamp
                     }
-                    self.db.images.update_one(
+                    db.images.update_one(
                         {'hash': image_hash},
                         {'$set': image_doc},
                         upsert=True
@@ -335,7 +333,7 @@ class ImageManager:
                         'description': description,
                         'timestamp': timestamp
                     }
-                    self.db.images.update_one(
+                    db.images.update_one(
                         {'hash': image_hash},
                         {'$set': image_doc},
                         upsert=True
diff --git a/src/plugins/memory_system/draw_memory.py b/src/plugins/memory_system/draw_memory.py
index d6ba8f3b2..df699f459 100644
--- a/src/plugins/memory_system/draw_memory.py
+++ b/src/plugins/memory_system/draw_memory.py
@@ -13,7 +13,7 @@ from loguru import logger
 root_path = os.path.abspath(os.path.join(os.path.dirname(__file__), "../../.."))
 sys.path.append(root_path)
 
-from src.common.database import Database  # 使用正确的导入语法
+from src.common.database import db  # 使用正确的导入语法
 
 # 加载.env.dev文件
 env_path = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(__file__)))), '.env.dev')
@@ -23,7 +23,6 @@ load_dotenv(env_path)
 class Memory_graph:
     def __init__(self):
         self.G = nx.Graph()  # 使用 networkx 的图结构
-        self.db = Database.get_instance()
 
     def connect_dot(self, concept1, concept2):
         self.G.add_edge(concept1, concept2)
@@ -96,7 +95,7 @@ class Memory_graph:
             dot_data = {
                 "concept": node
             }
-            self.db.store_memory_dots.insert_one(dot_data)
+            db.store_memory_dots.insert_one(dot_data)
 
     @property
     def dots(self):
@@ -106,7 +105,7 @@ class Memory_graph:
     def get_random_chat_from_db(self, length: int, timestamp: str):
         # 从数据库中根据时间戳获取离其最近的聊天记录
         chat_text = ''
-        closest_record = self.db.messages.find_one({"time": {"$lte": timestamp}}, sort=[('time', -1)])  # 调试输出
+        closest_record = db.messages.find_one({"time": {"$lte": timestamp}}, sort=[('time', -1)])  # 调试输出
         logger.info(
             f"距离time最近的消息时间: {time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(int(closest_record['time'])))}")
 
@@ -115,7 +114,7 @@ class Memory_graph:
             group_id = closest_record['group_id']  # 获取groupid
             # 获取该时间戳之后的length条消息，且groupid相同
             chat_record = list(
-                self.db.messages.find({"time": {"$gt": closest_time}, "group_id": group_id}).sort('time', 1).limit(
+                db.messages.find({"time": {"$gt": closest_time}, "group_id": group_id}).sort('time', 1).limit(
                     length))
             for record in chat_record:
                 time_str = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(int(record['time'])))
@@ -130,50 +129,39 @@ class Memory_graph:
 
     def save_graph_to_db(self):
         # 清空现有的图数据
-        self.db.graph_data.delete_many({})
+        db.graph_data.delete_many({})
         # 保存节点
         for node in self.G.nodes(data=True):
             node_data = {
                 'concept': node[0],
                 'memory_items': node[1].get('memory_items', [])  # 默认为空列表
             }
-            self.db.graph_data.nodes.insert_one(node_data)
+            db.graph_data.nodes.insert_one(node_data)
         # 保存边
         for edge in self.G.edges():
             edge_data = {
                 'source': edge[0],
                 'target': edge[1]
             }
-            self.db.graph_data.edges.insert_one(edge_data)
+            db.graph_data.edges.insert_one(edge_data)
 
     def load_graph_from_db(self):
         # 清空当前图
         self.G.clear()
         # 加载节点
-        nodes = self.db.graph_data.nodes.find()
+        nodes = db.graph_data.nodes.find()
         for node in nodes:
             memory_items = node.get('memory_items', [])
             if not isinstance(memory_items, list):
                 memory_items = [memory_items] if memory_items else []
             self.G.add_node(node['concept'], memory_items=memory_items)
         # 加载边
-        edges = self.db.graph_data.edges.find()
+        edges = db.graph_data.edges.find()
         for edge in edges:
             self.G.add_edge(edge['source'], edge['target'])
 
 
 def main():
-    # 初始化数据库
-    Database.initialize(
-        uri=os.getenv("MONGODB_URI"),
-        host=os.getenv("MONGODB_HOST", "127.0.0.1"),
-        port=int(os.getenv("MONGODB_PORT", "27017")),
-        db_name=os.getenv("DATABASE_NAME", "MegBot"),
-        username=os.getenv("MONGODB_USERNAME"),
-        password=os.getenv("MONGODB_PASSWORD"),
-        auth_source=os.getenv("MONGODB_AUTH_SOURCE"),
-    )
-
     memory_graph = Memory_graph()
     memory_graph.load_graph_from_db()
 
diff --git a/src/plugins/memory_system/memory.py b/src/plugins/memory_system/memory.py
index d9e867e63..f87f037d5 100644
--- a/src/plugins/memory_system/memory.py
+++ b/src/plugins/memory_system/memory.py
@@ -10,12 +10,12 @@ import networkx as nx
 
 from loguru import logger
 from nonebot import get_driver
-from ...common.database import Database  # 使用正确的导入语法
+from ...common.database import db  # 使用正确的导入语法
 from ..chat.config import global_config
 from ..chat.utils import (
     calculate_information_content,
     cosine_similarity,
-    get_cloest_chat_from_db,
+    get_closest_chat_from_db,
     text_to_vector,
 )
 from ..models.utils_model import LLM_request
@@ -23,7 +23,6 @@ from ..models.utils_model import LLM_request
 class Memory_graph:
     def __init__(self):
         self.G = nx.Graph()  # 使用 networkx 的图结构
-        self.db = Database.get_instance()
 
     def connect_dot(self, concept1, concept2):
         # 避免自连接
@@ -191,19 +190,19 @@ class Hippocampus:
         # 短期：1h   中期：4h   长期：24h
         for _ in range(time_frequency.get('near')):
             random_time = current_timestamp - random.randint(1, 3600)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
 
         for _ in range(time_frequency.get('mid')):
             random_time = current_timestamp - random.randint(3600, 3600 * 4)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
 
         for _ in range(time_frequency.get('far')):
             random_time = current_timestamp - random.randint(3600 * 4, 3600 * 24)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
 
@@ -349,7 +348,7 @@ class Hippocampus:
     def sync_memory_to_db(self):
         """检查并同步内存中的图结构与数据库"""
         # 获取数据库中所有节点和内存中所有节点
-        db_nodes = list(self.memory_graph.db.graph_data.nodes.find())
+        db_nodes = list(db.graph_data.nodes.find())
         memory_nodes = list(self.memory_graph.G.nodes(data=True))
 
         # 转换数据库节点为字典格式,方便查找
@@ -377,7 +376,7 @@ class Hippocampus:
                     'created_time': created_time,
                     'last_modified': last_modified
                 }
-                self.memory_graph.db.graph_data.nodes.insert_one(node_data)
+                db.graph_data.nodes.insert_one(node_data)
             else:
                 # 获取数据库中节点的特征值
                 db_node = db_nodes_dict[concept]
@@ -385,7 +384,7 @@ class Hippocampus:
 
                 # 如果特征值不同,则更新节点
                 if db_hash != memory_hash:
-                    self.memory_graph.db.graph_data.nodes.update_one(
+                    db.graph_data.nodes.update_one(
                         {'concept': concept},
                         {'$set': {
                             'memory_items': memory_items,
@@ -396,7 +395,7 @@ class Hippocampus:
                     )
 
         # 处理边的信息
-        db_edges = list(self.memory_graph.db.graph_data.edges.find())
+        db_edges = list(db.graph_data.edges.find())
         memory_edges = list(self.memory_graph.G.edges(data=True))
 
         # 创建边的哈希值字典
@@ -428,11 +427,11 @@ class Hippocampus:
                     'created_time': created_time,
                     'last_modified': last_modified
                 }
-                self.memory_graph.db.graph_data.edges.insert_one(edge_data)
+                db.graph_data.edges.insert_one(edge_data)
             else:
                 # 检查边的特征值是否变化
                 if db_edge_dict[edge_key]['hash'] != edge_hash:
-                    self.memory_graph.db.graph_data.edges.update_one(
+                    db.graph_data.edges.update_one(
                         {'source': source, 'target': target},
                         {'$set': {
                             'hash': edge_hash,
@@ -451,7 +450,7 @@ class Hippocampus:
         self.memory_graph.G.clear()
 
         # 从数据库加载所有节点
-        nodes = list(self.memory_graph.db.graph_data.nodes.find())
+        nodes = list(db.graph_data.nodes.find())
         for node in nodes:
             concept = node['concept']
             memory_items = node.get('memory_items', [])
@@ -468,7 +467,7 @@ class Hippocampus:
                 if 'last_modified' not in node:
                     update_data['last_modified'] = current_time
                 
-                self.memory_graph.db.graph_data.nodes.update_one(
+                db.graph_data.nodes.update_one(
                     {'concept': concept},
                     {'$set': update_data}
                 )
@@ -485,7 +484,7 @@ class Hippocampus:
                                        last_modified=last_modified)
 
         # 从数据库加载所有边
-        edges = list(self.memory_graph.db.graph_data.edges.find())
+        edges = list(db.graph_data.edges.find())
         for edge in edges:
             source = edge['source']
             target = edge['target']
@@ -501,7 +500,7 @@ class Hippocampus:
                 if 'last_modified' not in edge:
                     update_data['last_modified'] = current_time
                 
-                self.memory_graph.db.graph_data.edges.update_one(
+                db.graph_data.edges.update_one(
                     {'source': source, 'target': target},
                     {'$set': update_data}
                 )
diff --git a/src/plugins/memory_system/memory_manual_build.py b/src/plugins/memory_system/memory_manual_build.py
index adf972a06..2d16998e0 100644
--- a/src/plugins/memory_system/memory_manual_build.py
+++ b/src/plugins/memory_system/memory_manual_build.py
@@ -19,7 +19,7 @@ import jieba
 root_path = os.path.abspath(os.path.join(os.path.dirname(__file__), "../../.."))
 sys.path.append(root_path)
 
-from src.common.database import Database
+from src.common.database import db
 from src.plugins.memory_system.offline_llm import LLMModel
 
 # 获取当前文件的目录
@@ -49,7 +49,7 @@ def calculate_information_content(text):
     
     return entropy
 
-def get_cloest_chat_from_db(db, length: int, timestamp: str):
+def get_closest_chat_from_db(length: int, timestamp: str):
     """从数据库中获取最接近指定时间戳的聊天记录，并记录读取次数
     
     Returns:
@@ -91,7 +91,6 @@ def get_cloest_chat_from_db(db, length: int, timestamp: str):
 class Memory_graph:
     def __init__(self):
         self.G = nx.Graph()  # 使用 networkx 的图结构
-        self.db = Database.get_instance()
         
     def connect_dot(self, concept1, concept2):
         # 如果边已存在，增加 strength
@@ -186,19 +185,19 @@ class Hippocampus:
         # 短期：1h   中期：4h   长期：24h
         for _ in range(time_frequency.get('near')):
             random_time = current_timestamp - random.randint(1, 3600*4)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
                 
         for _ in range(time_frequency.get('mid')):
             random_time = current_timestamp - random.randint(3600*4, 3600*24)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
                 
         for _ in range(time_frequency.get('far')):
             random_time = current_timestamp - random.randint(3600*24, 3600*24*7)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
                 
@@ -323,7 +322,7 @@ class Hippocampus:
         self.memory_graph.G.clear()
         
         # 从数据库加载所有节点
-        nodes = self.memory_graph.db.graph_data.nodes.find()
+        nodes = db.graph_data.nodes.find()
         for node in nodes:
             concept = node['concept']
             memory_items = node.get('memory_items', [])
@@ -334,7 +333,7 @@ class Hippocampus:
             self.memory_graph.G.add_node(concept, memory_items=memory_items)
             
         # 从数据库加载所有边
-        edges = self.memory_graph.db.graph_data.edges.find()
+        edges = db.graph_data.edges.find()
         for edge in edges:
             source = edge['source']
             target = edge['target']
@@ -371,7 +370,7 @@ class Hippocampus:
         使用特征值(哈希值)快速判断是否需要更新
         """
         # 获取数据库中所有节点和内存中所有节点
-        db_nodes = list(self.memory_graph.db.graph_data.nodes.find())
+        db_nodes = list(db.graph_data.nodes.find())
         memory_nodes = list(self.memory_graph.G.nodes(data=True))
         
         # 转换数据库节点为字典格式，方便查找
@@ -394,7 +393,7 @@ class Hippocampus:
                     'memory_items': memory_items,
                     'hash': memory_hash
                 }
-                self.memory_graph.db.graph_data.nodes.insert_one(node_data)
+                db.graph_data.nodes.insert_one(node_data)
             else:
                 # 获取数据库中节点的特征值
                 db_node = db_nodes_dict[concept]
@@ -403,7 +402,7 @@ class Hippocampus:
                 # 如果特征值不同，则更新节点
                 if db_hash != memory_hash:
                     # logger.info(f"更新节点内容: {concept}")
-                    self.memory_graph.db.graph_data.nodes.update_one(
+                    db.graph_data.nodes.update_one(
                         {'concept': concept},
                         {'$set': {
                             'memory_items': memory_items,
@@ -416,10 +415,10 @@ class Hippocampus:
         for db_node in db_nodes:
             if db_node['concept'] not in memory_concepts:
                 # logger.info(f"删除多余节点: {db_node['concept']}")
-                self.memory_graph.db.graph_data.nodes.delete_one({'concept': db_node['concept']})
+                db.graph_data.nodes.delete_one({'concept': db_node['concept']})
                 
         # 处理边的信息
-        db_edges = list(self.memory_graph.db.graph_data.edges.find())
+        db_edges = list(db.graph_data.edges.find())
         memory_edges = list(self.memory_graph.G.edges())
         
         # 创建边的哈希值字典
@@ -445,12 +444,12 @@ class Hippocampus:
                     'num': 1,
                     'hash': edge_hash
                 }
-                self.memory_graph.db.graph_data.edges.insert_one(edge_data)
+                db.graph_data.edges.insert_one(edge_data)
             else:
                 # 检查边的特征值是否变化
                 if db_edge_dict[edge_key]['hash'] != edge_hash:
                     logger.info(f"更新边: {source} - {target}")
-                    self.memory_graph.db.graph_data.edges.update_one(
+                    db.graph_data.edges.update_one(
                         {'source': source, 'target': target},
                         {'$set': {'hash': edge_hash}}
                     )
@@ -461,7 +460,7 @@ class Hippocampus:
             if edge_key not in memory_edge_set:
                 source, target = edge_key
                 logger.info(f"删除多余边: {source} - {target}")
-                self.memory_graph.db.graph_data.edges.delete_one({
+                db.graph_data.edges.delete_one({
                     'source': source,
                     'target': target
                 })
@@ -487,9 +486,9 @@ class Hippocampus:
             topic: 要删除的节点概念
         """
         # 删除节点
-        self.memory_graph.db.graph_data.nodes.delete_one({'concept': topic})
+        db.graph_data.nodes.delete_one({'concept': topic})
         # 删除所有涉及该节点的边
-        self.memory_graph.db.graph_data.edges.delete_many({
+        db.graph_data.edges.delete_many({
             '$or': [
                 {'source': topic},
                 {'target': topic}
@@ -902,17 +901,6 @@ def visualize_graph_lite(memory_graph: Memory_graph, color_by_memory: bool = Fal
     plt.show()
 
 async def main():
-    # 初始化数据库
-    logger.info("正在初始化数据库连接...")
-    Database.initialize(
-        uri=os.getenv("MONGODB_URI"),
-        host=os.getenv("MONGODB_HOST", "127.0.0.1"),
-        port=int(os.getenv("MONGODB_PORT", "27017")),
-        db_name=os.getenv("DATABASE_NAME", "MegBot"),
-        username=os.getenv("MONGODB_USERNAME"),
-        password=os.getenv("MONGODB_PASSWORD"),
-        auth_source=os.getenv("MONGODB_AUTH_SOURCE"),
-    )
     start_time = time.time()
 
     test_pare = {'do_build_memory':False,'do_forget_topic':False,'do_visualize_graph':True,'do_query':False,'do_merge_memory':False}
diff --git a/src/plugins/memory_system/memory_test1.py b/src/plugins/memory_system/memory_test1.py
index f86c8ea3d..245eb9b26 100644
--- a/src/plugins/memory_system/memory_test1.py
+++ b/src/plugins/memory_system/memory_test1.py
@@ -38,7 +38,7 @@ import jieba
 
 # from chat.config import global_config
 sys.path.append("C:/GitHub/MaiMBot")  # 添加项目根目录到 Python 路径
-from src.common.database import Database
+from src.common.database import db
 from src.plugins.memory_system.offline_llm import LLMModel
 
 # 获取当前文件的目录
@@ -56,45 +56,6 @@ else:
     logger.warning(f"未找到环境变量文件: {env_path}")
     logger.info("将使用默认配置")
 
-class Database:
-    _instance = None
-    db = None
-    
-    @classmethod
-    def get_instance(cls):
-        if cls._instance is None:
-            cls._instance = cls()
-        return cls._instance
-    
-    def __init__(self):
-        if not Database.db:
-            Database.initialize(
-                    uri=os.getenv("MONGODB_URI"),
-                    host=os.getenv("MONGODB_HOST", "127.0.0.1"),
-                    port=int(os.getenv("MONGODB_PORT", "27017")),
-                    db_name=os.getenv("DATABASE_NAME", "MegBot"),
-                    username=os.getenv("MONGODB_USERNAME"),
-                    password=os.getenv("MONGODB_PASSWORD"),
-                    auth_source=os.getenv("MONGODB_AUTH_SOURCE"),
-                )
-            
-    @classmethod
-    def initialize(cls, host, port, db_name, username=None, password=None, auth_source="admin"):
-        try:
-            if username and password:
-                uri = f"mongodb://{username}:{password}@{host}:{port}/{db_name}?authSource={auth_source}"
-            else:
-                uri = f"mongodb://{host}:{port}"
-                
-            client = pymongo.MongoClient(uri)
-            cls.db = client[db_name]
-            # 测试连接
-            client.server_info()
-            logger.success("MongoDB连接成功!")
-            
-        except Exception as e:
-            logger.error(f"初始化MongoDB失败: {str(e)}")
-            raise
 
 def calculate_information_content(text):
     """计算文本的信息量（熵）"""
@@ -108,7 +69,7 @@ def calculate_information_content(text):
     
     return entropy
 
-def get_cloest_chat_from_db(db, length: int, timestamp: str):
+def get_closest_chat_from_db(length: int, timestamp: str):
     """从数据库中获取最接近指定时间戳的聊天记录，并记录读取次数
     
     Returns:
@@ -163,7 +124,7 @@ class Memory_cortex:
         default_time = datetime.datetime.now().timestamp()
         
         # 从数据库加载所有节点
-        nodes = self.memory_graph.db.graph_data.nodes.find()
+        nodes = db.graph_data.nodes.find()
         for node in nodes:
             concept = node['concept']
             memory_items = node.get('memory_items', [])
@@ -180,7 +141,7 @@ class Memory_cortex:
                 created_time = default_time
                 last_modified = default_time
                 # 更新数据库中的节点
-                self.memory_graph.db.graph_data.nodes.update_one(
+                db.graph_data.nodes.update_one(
                     {'concept': concept},
                     {'$set': {
                         'created_time': created_time,
@@ -196,7 +157,7 @@ class Memory_cortex:
                                        last_modified=last_modified)
             
         # 从数据库加载所有边
-        edges = self.memory_graph.db.graph_data.edges.find()
+        edges = db.graph_data.edges.find()
         for edge in edges:
             source = edge['source']
             target = edge['target']
@@ -212,7 +173,7 @@ class Memory_cortex:
                     created_time = default_time
                     last_modified = default_time
                     # 更新数据库中的边
-                    self.memory_graph.db.graph_data.edges.update_one(
+                    db.graph_data.edges.update_one(
                         {'source': source, 'target': target},
                         {'$set': {
                             'created_time': created_time,
@@ -256,7 +217,7 @@ class Memory_cortex:
         current_time = datetime.datetime.now().timestamp()
         
         # 获取数据库中所有节点和内存中所有节点
-        db_nodes = list(self.memory_graph.db.graph_data.nodes.find())
+        db_nodes = list(db.graph_data.nodes.find())
         memory_nodes = list(self.memory_graph.G.nodes(data=True))
         
         # 转换数据库节点为字典格式，方便查找
@@ -280,7 +241,7 @@ class Memory_cortex:
                     'created_time': data.get('created_time', current_time),
                     'last_modified': data.get('last_modified', current_time)
                 }
-                self.memory_graph.db.graph_data.nodes.insert_one(node_data)
+                db.graph_data.nodes.insert_one(node_data)
             else:
                 # 获取数据库中节点的特征值
                 db_node = db_nodes_dict[concept]
@@ -288,7 +249,7 @@ class Memory_cortex:
                 
                 # 如果特征值不同，则更新节点
                 if db_hash != memory_hash:
-                    self.memory_graph.db.graph_data.nodes.update_one(
+                    db.graph_data.nodes.update_one(
                         {'concept': concept},
                         {'$set': {
                             'memory_items': memory_items,
@@ -301,10 +262,10 @@ class Memory_cortex:
         memory_concepts = set(node[0] for node in memory_nodes)
         for db_node in db_nodes:
             if db_node['concept'] not in memory_concepts:
-                self.memory_graph.db.graph_data.nodes.delete_one({'concept': db_node['concept']})
+                db.graph_data.nodes.delete_one({'concept': db_node['concept']})
                 
         # 处理边的信息
-        db_edges = list(self.memory_graph.db.graph_data.edges.find())
+        db_edges = list(db.graph_data.edges.find())
         memory_edges = list(self.memory_graph.G.edges(data=True))
         
         # 创建边的哈希值字典
@@ -332,11 +293,11 @@ class Memory_cortex:
                     'created_time': data.get('created_time', current_time),
                     'last_modified': data.get('last_modified', current_time)
                 }
-                self.memory_graph.db.graph_data.edges.insert_one(edge_data)
+                db.graph_data.edges.insert_one(edge_data)
             else:
                 # 检查边的特征值是否变化
                 if db_edge_dict[edge_key]['hash'] != edge_hash:
-                    self.memory_graph.db.graph_data.edges.update_one(
+                    db.graph_data.edges.update_one(
                         {'source': source, 'target': target},
                         {'$set': {
                             'hash': edge_hash,
@@ -350,7 +311,7 @@ class Memory_cortex:
         for edge_key in db_edge_dict:
             if edge_key not in memory_edge_set:
                 source, target = edge_key
-                self.memory_graph.db.graph_data.edges.delete_one({
+                db.graph_data.edges.delete_one({
                     'source': source,
                     'target': target
                 })
@@ -365,9 +326,9 @@ class Memory_cortex:
             topic: 要删除的节点概念
         """
         # 删除节点
-        self.memory_graph.db.graph_data.nodes.delete_one({'concept': topic})
+        db.graph_data.nodes.delete_one({'concept': topic})
         # 删除所有涉及该节点的边
-        self.memory_graph.db.graph_data.edges.delete_many({
+        db.graph_data.edges.delete_many({
             '$or': [
                 {'source': topic},
                 {'target': topic}
@@ -377,7 +338,6 @@ class Memory_cortex:
 class Memory_graph:
     def __init__(self):
         self.G = nx.Graph()  # 使用 networkx 的图结构
-        self.db = Database.get_instance()
         
     def connect_dot(self, concept1, concept2):
         # 避免自连接
@@ -492,19 +452,19 @@ class Hippocampus:
         # 短期：1h   中期：4h   长期：24h
         for _ in range(time_frequency.get('near')):
             random_time = current_timestamp - random.randint(1, 3600*4)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
                 
         for _ in range(time_frequency.get('mid')):
             random_time = current_timestamp - random.randint(3600*4, 3600*24)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
                 
         for _ in range(time_frequency.get('far')):
             random_time = current_timestamp - random.randint(3600*24, 3600*24*7)
-            messages = get_cloest_chat_from_db(db=self.memory_graph.db, length=chat_size, timestamp=random_time)
+            messages = get_closest_chat_from_db(length=chat_size, timestamp=random_time)
             if messages:
                 chat_samples.append(messages)
                 
@@ -1134,7 +1094,6 @@ def visualize_graph_lite(memory_graph: Memory_graph, color_by_memory: bool = Fal
 async def main():
     # 初始化数据库
     logger.info("正在初始化数据库连接...")
-    db = Database.get_instance()
     start_time = time.time()
     
     test_pare = {'do_build_memory':True,'do_forget_topic':False,'do_visualize_graph':True,'do_query':False,'do_merge_memory':False}
diff --git a/src/plugins/models/utils_model.py b/src/plugins/models/utils_model.py
index aa07bb55d..afe4baeb5 100644
--- a/src/plugins/models/utils_model.py
+++ b/src/plugins/models/utils_model.py
@@ -10,7 +10,7 @@ from nonebot import get_driver
 import base64
 from PIL import Image
 import io
-from ...common.database import Database
+from ...common.database import db
 from ..chat.config import global_config
 
 driver = get_driver()
@@ -34,17 +34,16 @@ class LLM_request:
         self.pri_out = model.get("pri_out", 0)
 
         # 获取数据库实例
-        self.db = Database.get_instance()
         self._init_database()
 
     def _init_database(self):
         """初始化数据库集合"""
         try:
             # 创建llm_usage集合的索引
-            self.db.llm_usage.create_index([("timestamp", 1)])
-            self.db.llm_usage.create_index([("model_name", 1)])
-            self.db.llm_usage.create_index([("user_id", 1)])
-            self.db.llm_usage.create_index([("request_type", 1)])
+            db.llm_usage.create_index([("timestamp", 1)])
+            db.llm_usage.create_index([("model_name", 1)])
+            db.llm_usage.create_index([("user_id", 1)])
+            db.llm_usage.create_index([("request_type", 1)])
         except Exception:
             logger.error("创建数据库索引失败")
 
@@ -73,7 +72,7 @@ class LLM_request:
                 "status": "success",
                 "timestamp": datetime.now()
             }
-            self.db.llm_usage.insert_one(usage_data)
+            db.llm_usage.insert_one(usage_data)
             logger.info(
                 f"Token使用情况 - 模型: {self.model_name}, "
                 f"用户: {user_id}, 类型: {request_type}, "
diff --git a/src/plugins/schedule/schedule_generator.py b/src/plugins/schedule/schedule_generator.py
index bde593890..5f62d6aca 100644
--- a/src/plugins/schedule/schedule_generator.py
+++ b/src/plugins/schedule/schedule_generator.py
@@ -8,7 +8,7 @@ from nonebot import get_driver
 
 from src.plugins.chat.config import global_config
 
-from ...common.database import Database  # 使用正确的导入语法
+from ...common.database import db  # 使用正确的导入语法
 from ..models.utils_model import LLM_request
 
 driver = get_driver()
@@ -19,7 +19,6 @@ class ScheduleGenerator:
         # 根据global_config.llm_normal这一字典配置指定模型
         # self.llm_scheduler = LLMModel(model = global_config.llm_normal,temperature=0.9)
         self.llm_scheduler = LLM_request(model=global_config.llm_normal, temperature=0.9)
-        self.db = Database.get_instance()
         self.today_schedule_text = ""
         self.today_schedule = {}
         self.tomorrow_schedule_text = ""
@@ -46,7 +45,7 @@ class ScheduleGenerator:
 
         schedule_text = str
 
-        existing_schedule = self.db.schedule.find_one({"date": date_str})
+        existing_schedule = db.schedule.find_one({"date": date_str})
         if existing_schedule:
             logger.debug(f"{date_str}的日程已存在:")
             schedule_text = existing_schedule["schedule"]
@@ -63,7 +62,7 @@ class ScheduleGenerator:
 
             try:
                 schedule_text, _ = await self.llm_scheduler.generate_response(prompt)
-                self.db.schedule.insert_one({"date": date_str, "schedule": schedule_text})
+                db.schedule.insert_one({"date": date_str, "schedule": schedule_text})
             except Exception as e:
                 logger.error(f"生成日程失败: {str(e)}")
                 schedule_text = "生成日程时出错了"
@@ -143,7 +142,7 @@ class ScheduleGenerator:
         """打印完整的日程安排"""
         if not self._parse_schedule(self.today_schedule_text):
             logger.warning("今日日程有误，将在下次运行时重新生成")
-            self.db.schedule.delete_one({"date": datetime.datetime.now().strftime("%Y-%m-%d")})
+            db.schedule.delete_one({"date": datetime.datetime.now().strftime("%Y-%m-%d")})
         else:
             logger.info("=== 今日日程安排 ===")
             for time_str, activity in self.today_schedule.items():
diff --git a/src/plugins/utils/statistic.py b/src/plugins/utils/statistic.py
index 4629f0e0b..e812bce4b 100644
--- a/src/plugins/utils/statistic.py
+++ b/src/plugins/utils/statistic.py
@@ -5,7 +5,7 @@ from datetime import datetime, timedelta
 from typing import Any, Dict
 from loguru import logger
 
-from ...common.database import Database
+from ...common.database import db
 
 
 class LLMStatistics:
@@ -15,7 +15,6 @@ class LLMStatistics:
         Args:
             output_file: 统计结果输出文件路径
         """
-        self.db = Database.get_instance()
         self.output_file = output_file
         self.running = False
         self.stats_thread = None
@@ -53,7 +52,7 @@ class LLMStatistics:
             "costs_by_model": defaultdict(float)
         }
         
-        cursor = self.db.llm_usage.find({
+        cursor = db.llm_usage.find({
             "timestamp": {"$gte": start_time}
         })
         
diff --git a/src/plugins/zhishi/knowledge_library.py b/src/plugins/zhishi/knowledge_library.py
index ad309814b..a049394fe 100644
--- a/src/plugins/zhishi/knowledge_library.py
+++ b/src/plugins/zhishi/knowledge_library.py
@@ -14,7 +14,7 @@ root_path = os.path.abspath(os.path.join(os.path.dirname(__file__), "../../.."))
 sys.path.append(root_path)
 
 # 现在可以导入src模块
-from src.common.database import Database
+from src.common.database import db
 
 # 加载根目录下的env.edv文件
 env_path = os.path.join(root_path, ".env.prod")
@@ -24,18 +24,6 @@ load_dotenv(env_path)
 
 class KnowledgeLibrary:
     def __init__(self):
-        # 初始化数据库连接
-        if Database._instance is None:
-            Database.initialize(
-                uri=os.getenv("MONGODB_URI"),
-                host=os.getenv("MONGODB_HOST", "127.0.0.1"),
-                port=int(os.getenv("MONGODB_PORT", "27017")),
-                db_name=os.getenv("DATABASE_NAME", "MegBot"),
-                username=os.getenv("MONGODB_USERNAME"),
-                password=os.getenv("MONGODB_PASSWORD"),
-                auth_source=os.getenv("MONGODB_AUTH_SOURCE"),
-            )
-        self.db = Database.get_instance()
         self.raw_info_dir = "data/raw_info"
         self._ensure_dirs()
         self.api_key = os.getenv("SILICONFLOW_KEY")
@@ -176,7 +164,7 @@ class KnowledgeLibrary:
         
         try:
             current_hash = self.calculate_file_hash(file_path)
-            processed_record = self.db.processed_files.find_one({"file_path": file_path})
+            processed_record = db.processed_files.find_one({"file_path": file_path})
             
             if processed_record:
                 if processed_record.get("hash") == current_hash:
@@ -197,14 +185,14 @@ class KnowledgeLibrary:
                         "split_length": knowledge_length,
                         "created_at": datetime.now()
                     }
-                    self.db.knowledges.insert_one(knowledge)
+                    db.knowledges.insert_one(knowledge)
                     result["chunks_processed"] += 1
             
             split_by = processed_record.get("split_by", []) if processed_record else []
             if knowledge_length not in split_by:
                 split_by.append(knowledge_length)
             
-            self.db.knowledges.processed_files.update_one(
+            db.knowledges.processed_files.update_one(
                 {"file_path": file_path},
                 {
                     "$set": {
@@ -322,7 +310,7 @@ class KnowledgeLibrary:
             {"$project": {"content": 1, "similarity": 1, "file_path": 1}}
         ]
         
-        results = list(self.db.knowledges.aggregate(pipeline))
+        results = list(db.knowledges.aggregate(pipeline))
         return results
 
 # 创建单例实例
@@ -346,7 +334,7 @@ if __name__ == "__main__":
         elif choice == '2':
             confirm = input("确定要删除所有知识吗？这个操作不可撤销！(y/n): ").strip().lower()
             if confirm == 'y':
-                knowledge_library.db.knowledges.delete_many({})
+                db.knowledges.delete_many({})
                 console.print("[green]已清空所有知识！[/green]")
             continue
         elif choice == '1':