diff --git a/backend/config_manager.py b/backend/config_manager.py
index 82f46e9..768f9a2 100644
--- a/backend/config_manager.py
+++ b/backend/config_manager.py
@@ -29,7 +29,15 @@ except Exception:
 project_root = Path(__file__).parent.parent
 sys.path.insert(0, str(project_root))
 
-from database.models import TradingConfig
+# 延迟导入，避免在trading_system中导入时因为缺少依赖而失败
+try:
+    from database.models import TradingConfig
+except ImportError as e:
+    TradingConfig = None
+    import logging
+    logger = logging.getLogger(__name__)
+    logger.warning(f"无法导入TradingConfig: {e}，配置管理器将无法使用数据库")
+
 import logging
 
 logger = logging.getLogger(__name__)
@@ -44,6 +52,11 @@ class ConfigManager:
     
     def _load_from_db(self):
         """从数据库加载配置"""
+        if TradingConfig is None:
+            logger.warning("TradingConfig未导入，无法从数据库加载配置")
+            self._cache = {}
+            return
+        
         try:
             configs = TradingConfig.get_all()
             for config in configs:
@@ -74,6 +87,11 @@ class ConfigManager:
     
     def set(self, key, value, config_type='string', category='general', description=None):
         """设置配置（同时更新数据库和缓存）"""
+        if TradingConfig is None:
+            logger.warning("TradingConfig未导入，无法更新数据库配置")
+            self._cache[key] = value
+            return
+        
         try:
             TradingConfig.set(key, value, config_type, category, description)
             self._cache[key] = value
diff --git a/trading_system/requirements.txt b/trading_system/requirements.txt
index 1d29d5c..6153487 100644
--- a/trading_system/requirements.txt
+++ b/trading_system/requirements.txt
@@ -3,3 +3,7 @@ python-binance==1.0.19
 websocket-client==1.6.1
 aiohttp==3.9.1
 unicorn-binance-websocket-api==2.4.0
+
+# 数据库依赖（用于从数据库读取配置）
+pymysql==1.1.0
+python-dotenv==1.0.0