diff --git a/cocos/base/CCMap.h b/cocos/base/CCMap.h
index 1c8c53ef0a..8144a9d90e 100644
--- a/cocos/base/CCMap.h
+++ b/cocos/base/CCMap.h
@@ -274,9 +274,9 @@ public:
     void insert(const K& key, V object)
     {
         CCASSERT(object != nullptr, "Object is nullptr!");
+        object->retain();
         erase(key);
         _data.insert(std::make_pair(key, object));
-        object->retain();
     }
     
     /** 
@@ -308,7 +308,6 @@ public:
             _data.erase(iter);
             return 1;
         }
-        
         return 0;
     }