diff --git a/plugins/task_manager/task_manager_index.py b/plugins/task_manager/task_manager_index.py
index 6d3cd24f87..c22ff7eabc 100755
--- a/plugins/task_manager/task_manager_index.py
+++ b/plugins/task_manager/task_manager_index.py
@@ -88,8 +88,10 @@ def get_process_net_list(self):
             tmp['down_package'] = int(np_list[3])
             tmp['up_package'] = int(np_list[4])
             self.__process_net_list[tmp['pid']] = tmp
-        self.last_net_process = self.__process_net_list
-        self.last_net_process_time = time.time()
+
+        if time.time() - self.last_net_process_time > 3:
+            self.last_net_process = self.__process_net_list
+            self.last_net_process_time = time.time()
 
     # 获取进程连接数
     def get_connects(self, pid):