diff --git a/cocos/base/CCMap.h b/cocos/base/CCMap.h
index dab3b729c0..097e33992c 100644
--- a/cocos/base/CCMap.h
+++ b/cocos/base/CCMap.h
@@ -282,7 +282,6 @@ public:
     {
         if (!_data.empty())
         {
-            srand(time(NULL));
             ssize_t randIdx = rand() % _data.size();
             iterator randIter = _data.begin();
             std::advance(randIter , randIdx);
diff --git a/cocos/base/CCVector.h b/cocos/base/CCVector.h
index e420012001..d751479d23 100644
--- a/cocos/base/CCVector.h
+++ b/cocos/base/CCVector.h
@@ -229,7 +229,6 @@ public:
     {
         if (!_data.empty())
         {
-            srand(time(NULL));
             ssize_t randIdx = rand() % _data.size();
             return *(_data.begin() + randIdx);
         }