diff --git a/class/core/plugins_api.py b/class/core/plugins_api.py
index 160bc657b..b4770017a 100755
--- a/class/core/plugins_api.py
+++ b/class/core/plugins_api.py
@@ -1090,7 +1090,8 @@ class plugins_api:
         if not os.path.exists(package):
             return (False, "插件不存在!")
 
-        sys.path.append(package)
+        if not package in sys.path:
+            sys.path.append(package)
         eval_str = "__import__('" + script + "')." + func + '(' + args + ')'
         newRet = eval(eval_str)
         if mw.isDebugMode():