diff --git a/frameworks/core/task_manager.cpp b/frameworks/core/task_manager.cpp
index 25e435578606fcb544299d84a35745907961ac8c..3cd67f05d0c038c96750d1b6af5ffad0f835503b 100755
--- a/frameworks/core/task_manager.cpp
+++ b/frameworks/core/task_manager.cpp
@@ -24,6 +24,7 @@ TaskManager* TaskManager::GetInstance()
     static TaskManager taskManager;
     return &taskManager;
 }
+
 void TaskManager::Add(Task* task)
 {
     if (task == nullptr) {
diff --git a/interfaces/innerkits/common/task_manager.h b/interfaces/innerkits/common/task_manager.h
index 8d482538e2a6cd0798b536944a9a7ae55f2e4718..f0e0389a535f701736dc3659cc697a93e450ecd5 100755
--- a/interfaces/innerkits/common/task_manager.h
+++ b/interfaces/innerkits/common/task_manager.h
@@ -70,17 +70,18 @@ public:
      */
     void ResetTaskHandlerMutex();
 
-protected:
-    List<Task*> list_; /* the task list */
-    bool canTaskRun_;
-    bool isHandlerRunning_;
-    uint8_t idleLast_;
-
 private:
-    TaskManager() : canTaskRun_(false), isHandlerRunning_(false), idleLast_(0) {}
+    TaskManager() : canTaskRun_(false), isHandlerRunning_(false) {}
     ~TaskManager() {}
 
-    static const uint16_t IDLE_MEAS_PERIOD = 500;
+    TaskManager(const TaskManager&) = delete;
+    TaskManager& operator=(const TaskManager&) = delete;
+    TaskManager(TaskManager&&) = delete;
+    TaskManager& operator=(TaskManager&&) = delete;
+
+    List<Task*> list_; /* the task list */
+    bool canTaskRun_;
+    bool isHandlerRunning_;
 };
 } // namespace OHOS
 #endif // GRAPHIC_LITE_TASK_MANAGER_H