diff --git a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java
index 6a0311e7..a7c0d7f6 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java
@@ -278,7 +278,7 @@ public class StudyCourseServiceImpl implements IStudyCourseService{
 		//删除课程学习得分记录
 		studyScoreDao.deleteByFilter(FieldFilters.eq("studyId",id));
 		//删除课程学习时长记录
-//		studyTimeDao.deleteByFilter(FieldFilters.eq("studyId",id));
+		studyTimeDao.deleteByFilter(FieldFilters.eq("studyId",id));
 		//删除课程报名信息
 		signupDao.deleteByFilter(FieldFilters.and(FieldFilters.eq("courseId",courseId),FieldFilters.eq("aid",aid)));
 		//修改课程学习人数