diff --git a/requirements.txt b/requirements.txt
index 59b07ffc1..8192988a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,6 +51,8 @@ httpx[socks]
 packaging
 rich
 psutil
+objgraph
+Pympler
 cryptography
 json-repair
 reportportal-client
diff --git a/src/common/mem_monitor.py b/src/common/mem_monitor.py
new file mode 100644
index 000000000..e9f60585c
--- /dev/null
+++ b/src/common/mem_monitor.py
@@ -0,0 +1,383 @@
+# mem_monitor.py
+"""
+内存监控工具模块
+
+用于监控和诊断 MoFox-Bot 的内存使用情况，包括：
+- RSS/VMS 内存使用追踪
+- tracemalloc 内存分配差异分析
+- 对象类型增长监控 (objgraph)
+- 类型内存占用分析 (Pympler)
+
+通过环境变量 MEM_MONITOR_ENABLED 控制是否启用（默认禁用）
+日志输出到独立文件 logs/mem_monitor.log
+"""
+
+import logging
+import os
+import threading
+import time
+import tracemalloc
+from datetime import datetime
+from logging.handlers import RotatingFileHandler
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+import objgraph
+import psutil
+from pympler import muppy, summary
+
+if TYPE_CHECKING:
+    from psutil import Process
+
+# 创建独立的内存监控日志器
+def _setup_mem_logger() -> logging.Logger:
+    """设置独立的内存监控日志器，输出到单独的文件"""
+    logger = logging.getLogger("mem_monitor")
+    logger.setLevel(logging.DEBUG)
+    logger.propagate = False  # 不传播到父日志器，避免污染主日志
+    
+    # 清除已有的处理器
+    logger.handlers.clear()
+    
+    # 创建日志目录
+    log_dir = Path("logs")
+    log_dir.mkdir(exist_ok=True)
+    
+    # 文件处理器 - 带日期的日志文件，支持轮转
+    log_file = log_dir / f"mem_monitor_{datetime.now().strftime('%Y%m%d')}.log"
+    file_handler = RotatingFileHandler(
+        log_file,
+        maxBytes=50 * 1024 * 1024,  # 50MB
+        backupCount=5,
+        encoding="utf-8",
+    )
+    file_handler.setLevel(logging.DEBUG)
+    
+    # 格式化器
+    formatter = logging.Formatter(
+        "%(asctime)s | %(levelname)-7s | %(message)s",
+        datefmt="%Y-%m-%d %H:%M:%S",
+    )
+    file_handler.setFormatter(formatter)
+    
+    # 控制台处理器 - 只输出重要信息
+    console_handler = logging.StreamHandler()
+    console_handler.setLevel(logging.INFO)
+    console_handler.setFormatter(formatter)
+    
+    logger.addHandler(file_handler)
+    logger.addHandler(console_handler)
+    
+    return logger
+
+
+logger = _setup_mem_logger()
+
+_process: "Process" = psutil.Process()
+_last_snapshot: tracemalloc.Snapshot | None = None
+_last_type_summary: list | None = None
+_monitor_thread: threading.Thread | None = None
+_stop_event: threading.Event = threading.Event()
+
+# 环境变量控制是否启用，防止所有环境一起开
+MEM_MONITOR_ENABLED = False
+
+
+def start_tracemalloc(max_frames: int = 25) -> None:
+    """启动 tracemalloc 内存追踪
+
+    Args:
+        max_frames: 追踪的最大栈帧数，越大越详细但开销越大
+    """
+    if not tracemalloc.is_tracing():
+        tracemalloc.start(max_frames)
+        logger.info("tracemalloc started with max_frames=%s", max_frames)
+    else:
+        logger.info("tracemalloc already started")
+
+
+def stop_tracemalloc() -> None:
+    """停止 tracemalloc 内存追踪"""
+    if tracemalloc.is_tracing():
+        tracemalloc.stop()
+        logger.info("tracemalloc stopped")
+
+
+def log_rss(tag: str = "periodic") -> dict[str, float]:
+    """记录当前进程的 RSS 和 VMS 内存使用
+
+    Args:
+        tag: 日志标签，用于区分不同的采样点
+
+    Returns:
+        包含 rss_mb 和 vms_mb 的字典
+    """
+    mem = _process.memory_info()
+    rss_mb = mem.rss / (1024 * 1024)
+    vms_mb = mem.vms / (1024 * 1024)
+    logger.info("[MEM %s] RSS=%.1f MiB, VMS=%.1f MiB", tag, rss_mb, vms_mb)
+    return {"rss_mb": rss_mb, "vms_mb": vms_mb}
+
+
+def log_tracemalloc_diff(tag: str = "periodic", limit: int = 20):
+    global _last_snapshot
+
+    if not tracemalloc.is_tracing():
+        logger.warning("tracemalloc is not tracing, skip diff")
+        return
+
+    snapshot = tracemalloc.take_snapshot()
+    if _last_snapshot is None:
+        logger.info("[TM %s] first snapshot captured", tag)
+        _last_snapshot = snapshot
+        return
+
+    logger.info("[TM %s] top %s memory diffs (by traceback):", tag, limit)
+    top_stats = snapshot.compare_to(_last_snapshot, "traceback")
+
+    for idx, stat in enumerate(top_stats[:limit], start=1):
+        logger.info(
+            "[TM %s] #%d: size_diff=%s, count_diff=%s",
+            tag, idx, stat.size_diff, stat.count_diff
+        )
+        # 打完整调用栈
+        for line in stat.traceback.format():
+            logger.info("[TM %s]    %s", tag, line)
+
+    _last_snapshot = snapshot
+
+
+def log_object_growth(limit: int = 20) -> None:
+    """使用 objgraph 查看最近一段时间哪些对象类型数量增长
+
+    Args:
+        limit: 显示的最大增长类型数
+    """
+    logger.info("==== Objgraph growth (top %s) ====", limit)
+    try:
+        # objgraph.show_growth 默认输出到 stdout，需要捕获输出
+        import io
+        import sys
+        
+        # 捕获 stdout
+        old_stdout = sys.stdout
+        sys.stdout = buffer = io.StringIO()
+        
+        try:
+            objgraph.show_growth(limit=limit)
+        finally:
+            sys.stdout = old_stdout
+        
+        output = buffer.getvalue()
+        if output.strip():
+            for line in output.strip().split("\n"):
+                logger.info("[OG] %s", line)
+        else:
+            logger.info("[OG] No object growth detected")
+    except Exception:
+        logger.exception("objgraph.show_growth failed")
+
+
+def log_type_memory_diff() -> None:
+    """使用 Pympler 查看各类型对象占用的内存变化"""
+    global _last_type_summary
+    
+    import io
+    import sys
+    
+    all_objects = muppy.get_objects()
+    curr = summary.summarize(all_objects)
+
+    # 捕获 Pympler 的输出（summary.print_ 也是输出到 stdout）
+    old_stdout = sys.stdout
+    sys.stdout = buffer = io.StringIO()
+    
+    try:
+        if _last_type_summary is None:
+            logger.info("==== Pympler initial type summary ====")
+            summary.print_(curr)
+        else:
+            logger.info("==== Pympler type memory diff ====")
+            diff = summary.get_diff(_last_type_summary, curr)
+            summary.print_(diff)
+    finally:
+        sys.stdout = old_stdout
+
+    output = buffer.getvalue()
+    if output.strip():
+        for line in output.strip().split("\n"):
+            logger.info("[PY] %s", line)
+
+    _last_type_summary = curr
+
+
+def periodic_mem_monitor(interval_sec: int = 900, tracemalloc_limit: int = 20, objgraph_limit: int = 20) -> None:
+    """后台循环：定期记录 RSS、tracemalloc diff、对象增长情况
+
+    Args:
+        interval_sec: 采样间隔（秒）
+        tracemalloc_limit: tracemalloc 差异显示限制
+        objgraph_limit: objgraph 增长显示限制
+    """
+    if not MEM_MONITOR_ENABLED:
+        logger.info("Memory monitor disabled via MEM_MONITOR_ENABLED=0")
+        return
+
+    start_tracemalloc()
+
+    logger.info("Memory monitor thread started, interval=%s sec", interval_sec)
+
+    counter = 0
+    while not _stop_event.is_set():
+        # 使用 Event.wait 替代 time.sleep，支持优雅退出
+        if _stop_event.wait(timeout=interval_sec):
+            break
+
+        try:
+            counter += 1
+            log_rss("periodic")
+            log_tracemalloc_diff("periodic", limit=tracemalloc_limit)
+            log_object_growth(limit=objgraph_limit)
+            if counter % 3 == 0:
+                log_type_memory_diff()
+        except Exception:
+            logger.exception("Memory monitor iteration failed")
+
+    logger.info("Memory monitor thread stopped")
+
+
+def start_background_monitor(interval_sec: int = 300, tracemalloc_limit: int = 20, objgraph_limit: int = 20) -> bool:
+    """在项目入口调用，用线程避免阻塞主 event loop
+
+    Args:
+        interval_sec: 采样间隔（秒）
+        tracemalloc_limit: tracemalloc 差异显示限制
+        objgraph_limit: objgraph 增长显示限制
+
+    Returns:
+        是否成功启动监控线程
+    """
+    global _monitor_thread
+
+    if not MEM_MONITOR_ENABLED:
+        logger.info("Memory monitor not started (disabled via MEM_MONITOR_ENABLED env var).")
+        return False
+
+    if _monitor_thread is not None and _monitor_thread.is_alive():
+        logger.warning("Memory monitor thread already running")
+        return True
+
+    _stop_event.clear()
+    _monitor_thread = threading.Thread(
+        target=periodic_mem_monitor,
+        kwargs={
+            "interval_sec": interval_sec,
+            "tracemalloc_limit": tracemalloc_limit,
+            "objgraph_limit": objgraph_limit,
+        },
+        daemon=True,
+        name="MemoryMonitorThread",
+    )
+    _monitor_thread.start()
+    logger.info("Memory monitor thread created (interval=%s sec)", interval_sec)
+    return True
+
+
+def stop_background_monitor(timeout: float = 5.0) -> None:
+    """停止后台内存监控线程
+
+    Args:
+        timeout: 等待线程退出的超时时间（秒）
+    """
+    global _monitor_thread
+
+    if _monitor_thread is None or not _monitor_thread.is_alive():
+        logger.debug("Memory monitor thread not running")
+        return
+
+    logger.info("Stopping memory monitor thread...")
+    _stop_event.set()
+    _monitor_thread.join(timeout=timeout)
+
+    if _monitor_thread.is_alive():
+        logger.warning("Memory monitor thread did not stop within timeout")
+    else:
+        logger.info("Memory monitor thread stopped successfully")
+
+    _monitor_thread = None
+
+
+def manual_dump(tag: str = "manual") -> dict:
+    """手动触发一次采样，可以挂在 HTTP /debug/mem 上
+
+    Args:
+        tag: 日志标签
+
+    Returns:
+        包含内存信息的字典
+    """
+    logger.info("Manual memory dump started: %s", tag)
+    mem_info = log_rss(tag)
+    log_tracemalloc_diff(tag)
+    log_object_growth()
+    log_type_memory_diff()
+    logger.info("Manual memory dump finished: %s", tag)
+    return mem_info
+
+
+def debug_leak_for_type(type_name: str, max_depth: int = 5, filename: str | None = None) -> bool:
+    """对某个可疑类型画引用图，看是谁抓着它不放
+
+    建议只在本地/测试环境用，这个可能比较慢。
+
+    Args:
+        type_name: 要调试的类型名（如 'MySession'）
+        max_depth: 引用图的最大深度
+        filename: 输出文件名，默认为 "{type_name}_backrefs.png"
+
+    Returns:
+        是否成功生成引用图
+    """
+    if filename is None:
+        filename = f"{type_name}_backrefs.png"
+
+    try:
+        objs = objgraph.by_type(type_name)
+        if not objs:
+            logger.info("No objects of type %s", type_name)
+            return False
+
+        # 随便拿几个代表对象看引用链
+        roots = objs[:3]
+        logger.info(
+            "Generating backrefs graph for %s (num_roots=%s, max_depth=%s, file=%s)",
+            type_name,
+            len(roots),
+            max_depth,
+            filename,
+        )
+        objgraph.show_backrefs(
+            roots,
+            max_depth=max_depth,
+            filename=filename,
+        )
+        logger.info("Backrefs graph generated: %s", filename)
+        return True
+    except Exception:
+        logger.exception("debug_leak_for_type(%s) failed", type_name)
+        return False
+
+
+def get_memory_stats() -> dict:
+    """获取当前内存统计信息
+
+    Returns:
+        包含各项内存指标的字典
+    """
+    mem = _process.memory_info()
+    return {
+        "rss_mb": mem.rss / (1024 * 1024),
+        "vms_mb": mem.vms / (1024 * 1024),
+        "tracemalloc_enabled": tracemalloc.is_tracing(),
+        "monitor_thread_alive": _monitor_thread is not None and _monitor_thread.is_alive(),
+    }
diff --git a/src/main.py b/src/main.py
index a6c437cea..3e5754647 100644
--- a/src/main.py
+++ b/src/main.py
@@ -21,6 +21,11 @@ from src.common.core_sink_manager import (
     shutdown_core_sink_manager,
 )
 from src.common.logger import get_logger
+from src.common.mem_monitor import (
+    MEM_MONITOR_ENABLED,
+    start_background_monitor,
+    stop_background_monitor,
+)
 
 # 全局背景任务集合
 _background_tasks = set()
@@ -212,6 +217,12 @@ class MainSystem:
         self._shutting_down = True
         logger.info("开始系统清理流程...")
 
+        # 停止内存监控线程（无需 await，同步操作）
+        try:
+            stop_background_monitor(timeout=3.0)
+        except Exception as e:
+            logger.error(f"停止内存监控时出错: {e}")
+
         cleanup_tasks = []
 
         # 停止消息批处理器
@@ -568,6 +579,15 @@ MoFox_Bot(第三方修改版)
         except Exception as e:
             logger.error(f"启动适配器失败: {e}")
 
+        # 启动内存监控
+        try:
+            if MEM_MONITOR_ENABLED:
+                started = start_background_monitor(interval_sec=300)
+                if started:
+                    logger.info("[DEV] 已启动 (间隔=300s)")
+        except Exception as e:
+            logger.error(f"启动内存监控失败: {e}")
+
     async def _init_planning_components(self) -> None:
         """初始化计划相关组件"""
         # 初始化月度计划管理器