diff --git a/Nlbench_beta.sh b/Nlbench_beta.sh
index 4a2b599..90a6f07 100644
--- a/Nlbench_beta.sh
+++ b/Nlbench_beta.sh
@@ -445,6 +445,7 @@ main() {
 
     # 主循环
     while true; do
+        clear
         show_welcome
         main_menu
     done