diff --git a/frontend/control/create-index-ask-dialog.cpp b/frontend/control/create-index-ask-dialog.cpp
index 5d79699..dcf62d7 100644
--- a/frontend/control/create-index-ask-dialog.cpp
+++ b/frontend/control/create-index-ask-dialog.cpp
@@ -41,6 +41,8 @@ CreateIndexAskDialog::CreateIndexAskDialog(QWidget *parent) : QDialog(parent) {
     this->setWindowTitle(tr("ukui-search"));
 
     initUi();
+
+    this->installEventFilter(this);
 }
 
 void CreateIndexAskDialog::initUi() {
@@ -74,7 +76,6 @@ void CreateIndexAskDialog::initUi() {
     m_closeBtn->setFlat(true);
     connect(m_closeBtn, &QPushButton::clicked, this, [ = ]() {
         this->hide();
-        Q_EMIT this->closed();
     });
     m_titleLyt->addWidget(m_iconLabel);
     m_titleLyt->addWidget(m_titleLabel);
@@ -118,12 +119,10 @@ void CreateIndexAskDialog::initUi() {
     connect(m_cancelBtn, &QPushButton::clicked, this, [ = ]() {
         Q_EMIT this->btnClicked(false, m_checkBox->isChecked());
         this->hide();
-        Q_EMIT this->closed();
     });
     connect(m_confirmBtn, &QPushButton::clicked, this, [ = ]() {
         Q_EMIT this->btnClicked(true, m_checkBox->isChecked());
         this->hide();
-        Q_EMIT this->closed();
     });
     m_btnLyt->addStretch();
     m_btnLyt->addWidget(m_cancelBtn);
@@ -150,3 +149,21 @@ void CreateIndexAskDialog::paintEvent(QPaintEvent *event) {
     p.restore();
     return QDialog::paintEvent(event);
 }
+
+// esc按键直接调用hide，产生hideEvent
+void CreateIndexAskDialog::hideEvent(QHideEvent *event)
+{
+    Q_EMIT this->closed();
+    QWidget::hideEvent(event);
+}
+
+bool CreateIndexAskDialog::eventFilter(QObject *watched, QEvent *event)
+{
+    // kwin alt+f4发送的close事件会改变窗口的winid,屏蔽掉该事件，并发送hide事件
+    if ((watched == this) && (event->type() == QEvent::Close)) {
+        event->ignore();
+        this->hide();
+        return true;
+    }
+    return QDialog::eventFilter(watched, event);
+}
diff --git a/frontend/control/create-index-ask-dialog.h b/frontend/control/create-index-ask-dialog.h
index a59c5f2..4be0ae4 100644
--- a/frontend/control/create-index-ask-dialog.h
+++ b/frontend/control/create-index-ask-dialog.h
@@ -65,6 +65,10 @@ private:
 
     void paintEvent(QPaintEvent *);
 
+protected:
+    void hideEvent(QHideEvent *event) override;
+    bool eventFilter(QObject *watched, QEvent *event) override;
+
 Q_SIGNALS:
     void closed();
     void btnClicked(const bool&, const bool&);
diff --git a/frontend/mainwindow.cpp b/frontend/mainwindow.cpp
index 02c0d26..5d77297 100644
--- a/frontend/mainwindow.cpp
+++ b/frontend/mainwindow.cpp
@@ -96,7 +96,7 @@ MainWindow::~MainWindow() {
     if(m_settingsWidget) {
         delete m_settingsWidget;
         m_settingsWidget = NULL;
-
+    }
 #endif
     if(m_askDialog) {
         delete m_askDialog;
@@ -189,13 +189,13 @@ void MainWindow::initConnections()
  */
 void MainWindow::bootOptionsFilter(QString opt) {
     if(opt == "-s" || opt == "--show") {
-        clearSearchResult();
-        centerToScreen(this);
-        if(this->isHidden()) {
+        if (this->isHidden()) {
+            clearSearchResult();
+            centerToScreen(this);
             this->show();
+            this->m_searchBarWidget->setFocus();
+            this->activateWindow();
         }
-        this->m_searchBarWidget->setFocus();
-        this->activateWindow();
     }
 }
 
@@ -555,3 +555,14 @@ void MainWindow::paintEvent(QPaintEvent *event) {
     KWindowEffects::enableBlurBehind(this->winId(), true, QRegion(path.toFillPolygon().toPolygon()));
 
 }
+
+bool MainWindow::eventFilter(QObject *watched, QEvent *event)
+{
+    //kwin alt+f4发出close事件, 需要在存在子窗口时屏蔽该事件
+    if ((watched == this) && (event->type() == QEvent::Close)) {
+        event->ignore();
+        tryHideMainwindow();
+        return true;
+    }
+    return QObject::eventFilter(watched, event);
+}
diff --git a/frontend/mainwindow.h b/frontend/mainwindow.h
index b7aa55b..2558654 100644
--- a/frontend/mainwindow.h
+++ b/frontend/mainwindow.h
@@ -84,6 +84,9 @@ protected:
     void initUi();
     void initConnections();
 
+public:
+    bool eventFilter(QObject *watched, QEvent *event) override;
+
 Q_SIGNALS:
     void searchMethodChanged(FileUtils::SearchMethod);
     void webEngineChanged();