diff --git a/zh-cn/application-dev/reference/apis-backgroundtasks-kit/js-apis-WorkSchedulerExtensionAbility.md b/zh-cn/application-dev/reference/apis-backgroundtasks-kit/js-apis-WorkSchedulerExtensionAbility.md
index 692d0dfce88a1bfdc0bb699b4b0d64e42af4f09a..0159d66ae6a8af0fb71d6028907d5ac4d0dc52de 100644
--- a/zh-cn/application-dev/reference/apis-backgroundtasks-kit/js-apis-WorkSchedulerExtensionAbility.md
+++ b/zh-cn/application-dev/reference/apis-backgroundtasks-kit/js-apis-WorkSchedulerExtensionAbility.md
@@ -64,7 +64,7 @@ onWorkStart(work: workScheduler.WorkInfo): void
 
 onWorkStop(work: workScheduler.WorkInfo): void
 
-结束延迟任务调度回调。
+结束延迟任务调度回调。当延迟任务2分钟超时、或应用调用[stopWork](js-apis-resourceschedule-workScheduler.md#workschedulerstopwork)接口主动取消延迟任务时，触发该接口回调。
 
 **系统能力：** SystemCapability.ResourceSchedule.WorkScheduler