diff --git a/backend/app/crypto_agent/crypto_agent.py b/backend/app/crypto_agent/crypto_agent.py
index 150a7f8..904ca2e 100644
--- a/backend/app/crypto_agent/crypto_agent.py
+++ b/backend/app/crypto_agent/crypto_agent.py
@@ -667,7 +667,6 @@ _crypto_agent: Optional['CryptoAgent'] = None
 
 def get_crypto_agent() -> 'CryptoAgent':
     """获取加密货币智能体单例"""
-    global _crypto_agent
-    if _crypto_agent is None:
-        _crypto_agent = CryptoAgent()
-    return _crypto_agent
+    # 直接使用类单例，不使用全局变量（避免 reload 时重置）
+    return CryptoAgent()
+
diff --git a/backend/app/services/price_monitor_service.py b/backend/app/services/price_monitor_service.py
index fc71918..0cca589 100644
--- a/backend/app/services/price_monitor_service.py
+++ b/backend/app/services/price_monitor_service.py
@@ -217,7 +217,6 @@ _price_monitor_service: Optional[PriceMonitorService] = None
 
 def get_price_monitor_service() -> PriceMonitorService:
     """获取价格监控服务单例"""
-    global _price_monitor_service
-    if _price_monitor_service is None:
-        _price_monitor_service = PriceMonitorService()
-    return _price_monitor_service
+    # 直接使用类单例，不使用全局变量（避免 reload 时重置）
+    return PriceMonitorService()
+