diff --git a/src/titlebar.cpp b/src/titlebar.cpp
index b9f217d..5736a7a 100644
--- a/src/titlebar.cpp
+++ b/src/titlebar.cpp
@@ -146,3 +146,12 @@ void TitleBar::setGoHomeBtn(bool isable)
     }
 
 }
+
+void TitleBar::mouseDoubleClickEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        toggleMaximize();
+    }
+
+    QWidget::mouseDoubleClickEvent(event);
+}
diff --git a/src/titlebar.h b/src/titlebar.h
index cf37e7c..9b4b70d 100644
--- a/src/titlebar.h
+++ b/src/titlebar.h
@@ -26,6 +26,8 @@ public:
 signals:
     void gohomesignal(); // 声明自定义信号
     void savePathUpdate(const QString& filePath);
+protected:
+    void mouseDoubleClickEvent(QMouseEvent *event);
 private:
     bool m_ismaximized;
     QToolButton *m_optionbtn = nullptr; // 菜单选项