diff --git a/src/plugins/chat/relationship_manager.py b/src/plugins/chat/relationship_manager.py
index f996d4fde..7b40ac688 100644
--- a/src/plugins/chat/relationship_manager.py
+++ b/src/plugins/chat/relationship_manager.py
@@ -6,6 +6,7 @@ from ...common.database import db
 from .message_base import UserInfo
 from .chat_stream import ChatStream
 import math
+from bson.decimal128 import Decimal128
 
 logger = get_module_logger("rel_manager")
 
@@ -113,6 +114,19 @@ class RelationshipManager:
         if relationship:
             for k, value in kwargs.items():
                 if k == "relationship_value":
+                    # 检查relationship.relationship_value是否为double类型
+                    if not isinstance(relationship.relationship_value, float):
+                        try:
+                            # 处理 Decimal128 类型
+                            if isinstance(relationship.relationship_value, Decimal128):
+                                relationship.relationship_value = float(relationship.relationship_value.to_decimal())
+                            else:
+                                relationship.relationship_value = float(relationship.relationship_value)
+                            logger.info(f"[关系管理] 用户 {user_id}({platform}) 的关系值已转换为double类型: {relationship.relationship_value}")
+                        except (ValueError, TypeError):
+                            # 如果不能解析/强转则将relationship.relationship_value设置为double类型的0
+                            relationship.relationship_value = 0.0
+                            logger.warning(f"[关系管理] 用户 {user_id}({platform}) 的关系值无法转换为double类型，已设置为0")
                     relationship.relationship_value += value
             await self.storage_relationship(relationship)
             relationship.saved = True