diff --git a/Jenkinsfile b/Jenkinsfile
index cb030e60252e56c0ecfd294708d4c20e0a236124..2ef8293bd438ff436020bb04afe930446df57e9b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -42,7 +42,7 @@ def pre_test(){
     killall -9 gdb || echo "no gdb running"
     killall -9 python3.8 || echo "no python program running"
     cd ${WKC}
-    git reset --hard HEAD~10 >/dev/null
+    //git reset --hard HEAD~10 >/dev/null
     '''
     script {
       if (env.CHANGE_TARGET == 'master') {
@@ -77,6 +77,7 @@ def pre_test(){
     git checkout -qf FETCH_HEAD
     export TZ=Asia/Harbin
     date
+    rm -rf debug
     mkdir debug
     cd debug
     cmake .. > /dev/null