diff --git a/centralwidget.cpp b/centralwidget.cpp
index 73b2bca..5ae65a9 100644
--- a/centralwidget.cpp
+++ b/centralwidget.cpp
@@ -105,7 +105,8 @@ void CentralWidget::importJson()
         return;
     if(!machine->setGrammar(filename))
     {
-        setStatus("请检查文件格式");
+        QMessageBox::warning(this, "警告", "请检查文件格式");
+        setStatus("导入失败");
         return;
     };
     setStatus(tr("导入成功"));
diff --git a/centralwidget.h b/centralwidget.h
index a04bd8a..149a0b8 100644
--- a/centralwidget.h
+++ b/centralwidget.h
@@ -12,6 +12,7 @@
 #include <QGraphicsView>
 #include <QListWidget>
 #include <QTimer>
+#include <QMessageBox>
 #include "turingmachine.h"
 #include "papertape.h"