diff --git a/DSView/pv/mainwindow.cpp b/DSView/pv/mainwindow.cpp
index 53455852..e2e21f57 100644
--- a/DSView/pv/mainwindow.cpp
+++ b/DSView/pv/mainwindow.cpp
@@ -120,6 +120,7 @@ namespace pv
         setContextMenuPolicy(Qt::NoContextMenu);
 
         _key_vaild = false;
+        _last_key_press_time = high_resolution_clock::now();
     }
 
     void MainWindow::setup_ui()
@@ -1106,6 +1107,14 @@ namespace pv
             {
                 return true;
             }
+
+            high_resolution_clock::time_point key_press_time = high_resolution_clock::now();
+            milliseconds timeInterval = std::chrono::duration_cast<milliseconds>(key_press_time - _last_key_press_time);
+            int64_t time_keep =  timeInterval.count();
+            if (time_keep < 500){
+                return true;
+            }
+            _last_key_press_time = key_press_time;           
             
             switch (ke->key())
             {
diff --git a/DSView/pv/mainwindow.h b/DSView/pv/mainwindow.h
index fe026994..a481c26b 100644
--- a/DSView/pv/mainwindow.h
+++ b/DSView/pv/mainwindow.h
@@ -31,6 +31,7 @@
 #include "interface/icallbacks.h"
 #include "eventobject.h" 
 #include <QJsonDocument>
+#include <chrono>
 
 class QAction;
 class QMenuBar;
@@ -40,11 +41,12 @@ class QStatusBar;
 class QToolBar;
 class QWidget;
 class QDockWidget;
-
 class AppControl;
-
 class DeviceAgent;
 
+using std::chrono::high_resolution_clock;
+using std::chrono::milliseconds;
+
 namespace pv {
  
 class SigSession;
@@ -210,6 +212,7 @@ private:
     SigSession      *_session;
     DeviceAgent     *_device_agent;
     bool            _is_auto_switch_device;
+    high_resolution_clock::time_point _last_key_press_time;
 
     int _key_value;
     bool _key_vaild;