diff --git a/cattools.sh b/cattools.sh
index 9ff746a..d149a19 100644
--- a/cattools.sh
+++ b/cattools.sh
@@ -371,6 +371,7 @@ while :; do
         ;;
         *)
             echo "无效的选择, 请重新输入"
+	    exit
         ;;
     esac