diff --git a/QtScrcpy/QtScrcpy.pro b/QtScrcpy/QtScrcpy.pro
index c947acc..0afdc4e 100644
--- a/QtScrcpy/QtScrcpy.pro
+++ b/QtScrcpy/QtScrcpy.pro
@@ -48,6 +48,10 @@ HEADERS += \
 FORMS += \
         dialog.ui
 
+# 试用检查
+# DEFINES += TRIAL_EXPIRE_CHECK
+DEFINES += TRIAL_TIMES=10
+
 # 子工程
 include ($$PWD/common/common.pri)
 include ($$PWD/adb/adb.pri)
diff --git a/QtScrcpy/device/ui/videoform.cpp b/QtScrcpy/device/ui/videoform.cpp
index 282bc16..36a6ef4 100644
--- a/QtScrcpy/device/ui/videoform.cpp
+++ b/QtScrcpy/device/ui/videoform.cpp
@@ -343,6 +343,16 @@ QRect VideoForm::getScreenRect()
     return screenRect;
 }
 
+bool VideoForm::checkTrialExpire()
+{
+    static int trialTimes = 0;
+    if (++trialTimes > TRIAL_TIMES) {
+        QMessageBox::warning(this, "QtScrcpy", QStringLiteral("试用已结束，购买正式版本请联系作者"), QMessageBox::Ok);
+        return true;
+    }
+    return false;
+}
+
 void VideoForm::updateStyleSheet(bool vertical)
 {
     if (vertical) {
@@ -500,6 +510,12 @@ void VideoForm::setDevice(Device *device)
 
 void VideoForm::mousePressEvent(QMouseEvent *event)
 {
+#ifdef TRIAL_EXPIRE_CHECK
+    if (checkTrialExpire()) {
+        return;
+    }
+#endif
+
     if (event->button() == Qt::MiddleButton) {
         if (m_device && !m_device->isCurrentCustomKeymap()) {
             emit m_device->postGoHome();
diff --git a/QtScrcpy/device/ui/videoform.h b/QtScrcpy/device/ui/videoform.h
index bda37a4..0b07c0c 100644
--- a/QtScrcpy/device/ui/videoform.h
+++ b/QtScrcpy/device/ui/videoform.h
@@ -45,6 +45,7 @@ private:
     void moveCenter();
     void installShortcut();
     QRect getScreenRect();
+    bool checkTrialExpire();
 
 protected:
     void mousePressEvent(QMouseEvent *event);