diff --git a/src/lock-backend/dbusupperinterface.cpp b/src/lock-backend/dbusupperinterface.cpp
index 90dac4f..940d699 100644
--- a/src/lock-backend/dbusupperinterface.cpp
+++ b/src/lock-backend/dbusupperinterface.cpp
@@ -623,7 +623,11 @@ void DbusUpperInterface::emitLockState(bool val)
 {
     qDebug() << "emitLockState state = " << val;
 
-    m_kglobalHelper->blockShortcut(val);
+    if (val != m_bBlockShortcutState) {
+        m_kglobalHelper->blockShortcut(val);
+        m_bBlockShortcutState = val;
+        qDebug() << " block all shortcut " << "blockShortcut states = " << m_bBlockShortcutState;
+    }
 
     QDBusMessage message;
     if (val) {
diff --git a/src/lock-backend/dbusupperinterface.h b/src/lock-backend/dbusupperinterface.h
index 6070942..67302bb 100644
--- a/src/lock-backend/dbusupperinterface.h
+++ b/src/lock-backend/dbusupperinterface.h
@@ -428,6 +428,7 @@ private:
     QByteArray pubKey, priKey;
     KglobalAccelHelper *m_kglobalHelper = nullptr;
     LibinputSwitchEvent *m_libinputSwitchEvent = nullptr;
+    bool m_bBlockShortcutState = false;
 };
 
 #endif // DBUSUPPERINTERFACE_H