diff --git a/Jenkinsfile b/Jenkinsfile
index 8952e493dbdc68fdf17e03b29604dfde3cc6ee62..6b3d9e51510ce10d38bd49a56a63e9859e5cd691 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -5,7 +5,7 @@ node {
     git url: 'https://github.com/taosdata/TDengine.git'
 }
 
-
+def kipstage=0
 def abortPreviousBuilds() {
   def currentJobName = env.JOB_NAME
   def currentBuildNumber = env.BUILD_NUMBER.toInteger()
@@ -63,6 +63,7 @@ def pre_test(){
     '''
     return 1
 }
+
 pipeline {
   agent none
   
@@ -72,12 +73,33 @@ pipeline {
   }
   
   stages {
-      
+      stage('pre_build'){
+          agent{label 'master'}
+          when {
+              changeRequest()
+          }
+          steps {
+          sh'''
+          cd ${WORKSPACE}
+          git checkout develop
+          git pull
+          git fetch origin +refs/pull/${CHANGE_ID}/merge
+          git checkout -qf FETCH_HEAD
+          '''
+          script{
+            skipstage=sh(script:"git --no-pager diff --name-only FETCH_HEAD develop|grep -v -E '.*md|//src//connector|Jenkinsfile|test-all.sh' || echo 1 ",returnStdout:true) 
+          }
+          }
+      }
     
       stage('Parallel test stage') {
+        
         //only build pr
         when {
               changeRequest()
+               expression {
+                    skipstage != 1
+              }
           }
       parallel {
         stage('python_1_s1') {
@@ -127,7 +149,7 @@ pipeline {
         stage('test_b1_s2') {
           agent{label 'b1'}
           steps {     
-            timeout(time: 90, unit: 'MINUTES'){       
+            timeout(time: 45, unit: 'MINUTES'){       
               pre_test()
               sh '''
               cd ${WKC}/tests
@@ -240,8 +262,7 @@ pipeline {
     }
   }
   }
-  post {      
-      
+  post {  
         success {
             emailext (
                 subject: "PR-result: Job '${env.JOB_NAME} [${env.BUILD_NUMBER}]' SUCCESS",
@@ -300,7 +321,7 @@ pipeline {
                                 <ul>
                                 <div style="font-size:18px">
                                     <li>构建名称>>分支：${env.BRANCH_NAME}</li>
-                                    <li>构建结果：<span style="color:green"> Successful </span></li>
+                                    <li>构建结果：<span style="color:red"> Failure </span></li>
                                     <li>构建编号：${BUILD_NUMBER}</li>
                                     <li>触发用户：${env.CHANGE_AUTHOR}</li>
                                     <li>提交信息：${env.CHANGE_TITLE}</li>