diff --git a/zh-cn/application-dev/background-task-management/background-task-dev-guide.md b/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
index 7c3b4e54911f38df952b0abe126611f1c4e142c1..9cf3022d4b2f3b1ba3feec10878c99e6b5a78648 100644
--- a/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
+++ b/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
@@ -33,15 +33,12 @@ import backgroundTaskManager from '@ohos.backgroundTaskManager';
 
 
 1. 申请延迟挂起
-
 ```js
 import backgroundTaskManager from '@ohos.backgroundTaskManager';
-
 let myReason = 'test requestSuspendDelay';
 let delayInfo = backgroundTaskManager.requestSuspendDelay(myReason, () => {
     console.info("Request suspension delay will time out.");
 });
-
 var id = delayInfo.requestId;console.info("requestId is: " + id);
 ```
 
@@ -54,7 +51,7 @@ backgroundTaskManager.getRemainingDelayTime(id).then( res => {
 }).catch( err => {
     console.log('promise => Operation failed. Cause: ' + err.data);
 });
-   ```
+```
 
 
 3. 取消延迟挂起