diff --git a/zh-cn/application-dev/task-management/continuous-task.md b/zh-cn/application-dev/task-management/continuous-task.md
index c027b5b4bb68cdb95319c94e54b66058366e8fd3..435ae6921da947407217f3d4baf604c9ecc165de 100644
--- a/zh-cn/application-dev/task-management/continuous-task.md
+++ b/zh-cn/application-dev/task-management/continuous-task.md
@@ -82,7 +82,7 @@
    
    ```ts
    import backgroundTaskManager from '@ohos.resourceschedule.backgroundTaskManager';
-   import wantAgent from '@ohos.app.ability.wantAgent';
+   import wantAgent, { WantAgent } from '@ohos.app.ability.wantAgent';
    ```
 
 4. 申请和取消长时任务。
@@ -99,10 +99,10 @@
    struct Index {
      @State message: string = 'ContinuousTask';
      // 通过getContext方法，来获取page所在的UIAbility上下文。
-     private context = getContext(this);
+     private context: Context = getContext(this);
    
      startContinuousTask() {
-       let wantAgentInfo = {
+       let wantAgentInfo: wantAgent.wantAgentInfo = {
          // 点击通知后，将要执行的动作列表
          wants: [
            {
@@ -119,30 +119,22 @@
        };
    
        // 通过wantAgent模块下getWantAgent方法获取WantAgent对象
-       wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
-         try {
-           backgroundTaskManager.startBackgroundRunning(this.context,
-           backgroundTaskManager.BackgroundMode.AUDIO_RECORDING, wantAgentObj).then(() => {
-             console.info(`Succeeded in operationing startBackgroundRunning.`);
-           }).catch((err) => {
-             console.error(`Failed to operation startBackgroundRunning. Code is ${err.code}, message is ${err.message}`);
-           });
-         } catch (error) {
-           console.error(`Failed to start background running. Code is ${error.code} message is ${error.message}`);
-         }
+       wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj: WantAgent) => {
+          backgroundTaskManager.startBackgroundRunning(this.context,
+            backgroundTaskManager.BackgroundMode.AUDIO_RECORDING, wantAgentObj).then(() => {
+            console.info(`Succeeded in operationing startBackgroundRunning.`);
+          }).catch((err: BusinessError) => {
+            console.error(`Failed to operation startBackgroundRunning. Code is ${err.code}, message is ${err.message}`);
+          });
        });
      }
    
      stopContinuousTask() {
-       try {
-         backgroundTaskManager.stopBackgroundRunning(this.context).then(() => {
-           console.info(`Succeeded in operationing stopBackgroundRunning.`);
-         }).catch((err) => {
-           console.error(`Failed to operation stopBackgroundRunning. Code is ${err.code}, message is ${err.message}`);
-         });
-       } catch (error) {
-         console.error(`Failed to stop background running. Code is ${error.code} message is ${error.message}`);
-       }
+        backgroundTaskManager.stopBackgroundRunning(this.context).then(() => {
+          console.info(`Succeeded in operationing stopBackgroundRunning.`);
+        }).catch((err: BusinessError) => {
+          console.error(`Failed to operation stopBackgroundRunning. Code is ${err.code}, message is ${err.message}`);
+        });
      }
    
      build() {
@@ -193,6 +185,9 @@
    
    ```ts
    import UIAbility from '@ohos.app.ability.UIAbility';
+   import window from '@ohos.window';
+   import AbilityConstant from '@ohos.app.ability.AbilityConstant';
+   import Want from '@ohos.app.ability.Want';
    
    const MSG_SEND_METHOD: string = 'CallSendMsg'
    
diff --git a/zh-cn/application-dev/task-management/work-scheduler.md b/zh-cn/application-dev/task-management/work-scheduler.md
index 484f68b5b93cf0b33a2e8e9cf0f86a2c3181694f..151854ae89fdd2cfe5e25900b33e89ca72b39abe 100644
--- a/zh-cn/application-dev/task-management/work-scheduler.md
+++ b/zh-cn/application-dev/task-management/work-scheduler.md
@@ -121,6 +121,7 @@ WorkInfo参数用于设置应用条件，参数设置时需遵循以下规则：
    
    ```ts
    import WorkSchedulerExtensionAbility from '@ohos.WorkSchedulerExtensionAbility';
+   import workScheduler fron '@ohos.resourceschedule.workScheduler';
    ```
 
 3. 实现WorkSchedulerExtension生命周期接口。
@@ -128,12 +129,12 @@ WorkInfo参数用于设置应用条件，参数设置时需遵循以下规则：
    ```ts
    export default class MyWorkSchedulerExtensionAbility extends WorkSchedulerExtensionAbility {
      // 延迟任务开始回调
-     onWorkStart(workInfo) {
+     onWorkStart(workInfo: workScheduler.WorkInfo) {
        console.info(`onWorkStart, workInfo = ${JSON.stringify(workInfo)}`);
      }
    
      // 延迟任务结束回调
-     onWorkStop(workInfo) {
+     onWorkStop(workInfo: workScheduler.WorkInfo) {
        console.info(`onWorkStop, workInfo is ${JSON.stringify(workInfo)}`);
      }
    }
@@ -173,7 +174,7 @@ WorkInfo参数用于设置应用条件，参数设置时需遵循以下规则：
 2. 申请延迟任务。
    
    ```ts
-   private workInfo = {
+   private workInfo: workScheduler.WorkInfo = {
      workId: 1,
      networkType: workScheduler.NetworkType.NETWORK_TYPE_WIFI,
      bundleName: 'com.example.application',
@@ -183,7 +184,7 @@ WorkInfo参数用于设置应用条件，参数设置时需遵循以下规则：
    try {
      workScheduler.startWork(this.workInfo);
      console.info(`startWork success`);
-   } catch (error) {
+   } catch (error: BusinessError) {
      console.error(`startWork failed. code is ${error.code} message is ${error.message}`);
    }
    ```
@@ -191,7 +192,7 @@ WorkInfo参数用于设置应用条件，参数设置时需遵循以下规则：
 3. 取消延迟任务。
    
    ```ts
-   private workInfo = {
+   private workInfo: workScheduler.workInfo = {
      workId: 1,
      networkType: workScheduler.NetworkType.NETWORK_TYPE_WIFI,
      bundleName: 'com.example.application', 
@@ -201,7 +202,7 @@ WorkInfo参数用于设置应用条件，参数设置时需遵循以下规则：
    try {
      workScheduler.stopWork(this.workInfo);
      console.info(`stopWork success`);
-   } catch (error) {
+   } catch (error: BusinessError) {
      console.error(`stopWork failed. code is ${error.code} message is ${error.message}`);
    }
    ```