diff --git a/Jenkinsfile b/Jenkinsfile
index 536cbe73a29510bcab57e7f906c024ceba37076a..59dcb35bac45073edf4223c4cfe0de09fef56078 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -63,6 +63,7 @@ def pre_test(){
     '''
     return 1
 }
+def kipstage=0
 pipeline {
   agent none
   
@@ -75,9 +76,27 @@ pipeline {
       
     
       stage('Parallel test stage') {
+        stage('pre_build'){
+          agent{label 'master'}
+          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) 
+          }
+          }
+      }
         //only build pr
         when {
               changeRequest()
+               expression {
+                    skipstage == 0
+              }
           }
       parallel {
         stage('python_1_s1') {
@@ -127,7 +146,7 @@ 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
@@ -244,8 +263,8 @@ pipeline {
       
         success {
             emailext (
-                subject: "PR-result: Job '${env.JOB_NAME} [${env.BUILD_NUMBER}]'",
-                body: '''<!DOCTYPE html>
+                subject: "PR-result: Job '${env.JOB_NAME} [${env.BUILD_NUMBER}]' SUCCESS",
+                body: """<!DOCTYPE html>
                 <html>
                 <head>
                 <meta charset="UTF-8">
@@ -261,29 +280,29 @@ pipeline {
                             <td>
                                 <ul>
                                 <div style="font-size:18px">
-                                    <li>构建名称>>分支：${PROJECT_NAME}</li>
+                                    <li>构建名称>>分支：${env.BRANCH_NAME}</li>
                                     <li>构建结果：<span style="color:green"> Successful </span></li>
                                     <li>构建编号：${BUILD_NUMBER}</li>
-                                    <li>触发用户：${CAUSE}</li>
+                                    <li>触发用户：${env.CHANGE_AUTHOR}</li>
                                     <li>提交信息：${CHANGE_TITLE}</li>
                                     <li>构建地址：<a href=${BUILD_URL}>${BUILD_URL}</a></li>
                                     <li>构建日志：<a href=${BUILD_URL}console>${BUILD_URL}console</a></li>
-                                    <li>变更集：${JELLY_SCRIPT}</li>
+                                    
                                 </div>
                                 </ul>
                             </td>
                         </tr>
                     </table></font>
                 </body>
-                </html>''',
+                </html>""",
                 to: "${env.CHANGE_AUTHOR_EMAIL}",
                 from: "support@taosdata.com"
             )
         }
         failure {
             emailext (
-                subject: "PR-result: Job '${env.JOB_NAME} [${env.BUILD_NUMBER}]'",
-                body: '''<!DOCTYPE html>
+                subject: "PR-result: Job '${env.JOB_NAME} [${env.BUILD_NUMBER}]' FAIL",
+                body: """<!DOCTYPE html>
                 <html>
                 <head>
                 <meta charset="UTF-8">
@@ -299,21 +318,21 @@ pipeline {
                             <td>
                                 <ul>
                                 <div style="font-size:18px">
-                                    <li>构建名称>>分支：${PROJECT_NAME}</li>
+                                    <li>构建名称>>分支：${env.BRANCH_NAME}</li>
                                     <li>构建结果：<span style="color:green"> Successful </span></li>
                                     <li>构建编号：${BUILD_NUMBER}</li>
-                                    <li>触发用户：${CAUSE}</li>
+                                    <li>触发用户：${env.CHANGE_AUTHOR}</li>
                                     <li>提交信息：${CHANGE_TITLE}</li>
                                     <li>构建地址：<a href=${BUILD_URL}>${BUILD_URL}</a></li>
                                     <li>构建日志：<a href=${BUILD_URL}console>${BUILD_URL}console</a></li>
-                                    <li>变更集：${JELLY_SCRIPT}</li>
+                                    
                                 </div>
                                 </ul>
                             </td>
                         </tr>
                     </table></font>
                 </body>
-                </html>''',
+                </html>""",
                 to: "${env.CHANGE_AUTHOR_EMAIL}",
                 from: "support@taosdata.com"
             )
