diff --git a/src/main/java/com/peanut/modules/common/dao/UserCourseBuyDao.java b/src/main/java/com/peanut/modules/common/dao/UserCourseBuyDao.java
new file mode 100644
index 00000000..ed74bf89
--- /dev/null
+++ b/src/main/java/com/peanut/modules/common/dao/UserCourseBuyDao.java
@@ -0,0 +1,9 @@
+package com.peanut.modules.common.dao;
+
+import com.github.yulichang.base.MPJBaseMapper;
+import com.peanut.modules.common.entity.UserCourseBuyEntity;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface UserCourseBuyDao extends MPJBaseMapper<UserCourseBuyEntity> {
+}
diff --git a/src/main/java/com/peanut/modules/common/entity/UserCourseBuyEntity.java b/src/main/java/com/peanut/modules/common/entity/UserCourseBuyEntity.java
new file mode 100644
index 00000000..58f41957
--- /dev/null
+++ b/src/main/java/com/peanut/modules/common/entity/UserCourseBuyEntity.java
@@ -0,0 +1,34 @@
+package com.peanut.modules.common.entity;
+
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableLogic;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+import java.util.Date;
+
+@Data
+@TableName("user_course_buy")
+public class UserCourseBuyEntity {
+
+    @TableId
+    private Integer id;
+
+    private Integer userId;
+
+    private Integer courseId;
+
+    private Integer catalogueId;
+
+    private Date createTime;
+
+    private Integer days;
+
+    private Date startTime;
+
+    private Date endTime;
+
+    @TableLogic
+    private Integer delFlag;
+
+}
diff --git a/src/main/java/com/peanut/modules/common/entity/UserToCourseEntity.java b/src/main/java/com/peanut/modules/common/entity/UserToCourseEntity.java
index a83f1391..442333e7 100644
--- a/src/main/java/com/peanut/modules/common/entity/UserToCourseEntity.java
+++ b/src/main/java/com/peanut/modules/common/entity/UserToCourseEntity.java
@@ -18,18 +18,10 @@ public class UserToCourseEntity {
 
     private Integer courseId;
 
-    private Integer catalogueId;
-
     private Date createTime;
 
-    private Integer days;
-
     private Date updateTime;
 
-    private Date startTime;
-
-    private Date endTime;
-
     @TableLogic
     private Integer delFlag;
 }
diff --git a/src/main/java/com/peanut/modules/master/service/impl/CourseCatalogueServiceImpl.java b/src/main/java/com/peanut/modules/master/service/impl/CourseCatalogueServiceImpl.java
index f9a810ea..dd03bfe0 100644
--- a/src/main/java/com/peanut/modules/master/service/impl/CourseCatalogueServiceImpl.java
+++ b/src/main/java/com/peanut/modules/master/service/impl/CourseCatalogueServiceImpl.java
@@ -19,7 +19,7 @@ public class CourseCatalogueServiceImpl extends ServiceImpl<CourseCatalogueDao,
     @Autowired
     private CourseCatalogueChapterDao courseCatalogueChapterDao;
     @Autowired
-    private UserToCourseDao userToCourseDao;
+    private UserCourseBuyDao userCourseBuyDao;
     @Autowired
     private ShopProductCourseDao shopProductCourseDao;
     @Autowired
@@ -42,10 +42,10 @@ public class CourseCatalogueServiceImpl extends ServiceImpl<CourseCatalogueDao,
         if(integer>0){
             return R.error(502,"删除失败，请先清空章节");
         }
-        LambdaQueryWrapper<UserToCourseEntity> userToCourseEntityLambdaQueryWrapper = new LambdaQueryWrapper<>();
-        userToCourseEntityLambdaQueryWrapper.eq(UserToCourseEntity::getCatalogueId,id);
-        userToCourseEntityLambdaQueryWrapper.gt(UserToCourseEntity::getEndTime,new Date());
-        Integer integer1 = userToCourseDao.selectCount(userToCourseEntityLambdaQueryWrapper);
+        LambdaQueryWrapper<UserCourseBuyEntity> userCourseBuyEntityLambdaQueryWrapper = new LambdaQueryWrapper<>();
+        userCourseBuyEntityLambdaQueryWrapper.eq(UserCourseBuyEntity::getCatalogueId,id);
+        userCourseBuyEntityLambdaQueryWrapper.gt(UserCourseBuyEntity::getEndTime,new Date());
+        Integer integer1 = userCourseBuyDao.selectCount(userCourseBuyEntityLambdaQueryWrapper);
         if(integer1>0){
             return R.error(502,"删除失败，有人已购买此课程");
         }
@@ -63,7 +63,7 @@ public class CourseCatalogueServiceImpl extends ServiceImpl<CourseCatalogueDao,
     @Override
     public void addCourseCatalogue(CourseCatalogueEntity courseCatalogue) {
         this.save(courseCatalogue);
-        if(courseCatalogue.getNeedCreate()==1){
+        if(courseCatalogue.getNeedCreate()!=null&&courseCatalogue.getNeedCreate()==1){
             this.createProduct(courseCatalogue);
         }
 
diff --git a/src/main/java/com/peanut/modules/master/service/impl/CourseServiceImpl.java b/src/main/java/com/peanut/modules/master/service/impl/CourseServiceImpl.java
index a442659b..f44340e5 100644
--- a/src/main/java/com/peanut/modules/master/service/impl/CourseServiceImpl.java
+++ b/src/main/java/com/peanut/modules/master/service/impl/CourseServiceImpl.java
@@ -86,8 +86,8 @@ public class CourseServiceImpl extends ServiceImpl<CourseDao, CourseEntity> impl
 
     @Override
     public R delCourse(int id) {
-        CourseCatalogueEntity courseCatalogueEntity = courseCatalogueDao.selectOne(new LambdaQueryWrapper<CourseCatalogueEntity>().eq(CourseCatalogueEntity::getCourseId, id));
-        if (courseCatalogueEntity!=null){
+        Integer integer = courseCatalogueDao.selectCount(new LambdaQueryWrapper<CourseCatalogueEntity>().eq(CourseCatalogueEntity::getCourseId, id));
+        if (integer>0){
             return R.error(501,"请先删除目录后再删除！");
         }
         this.removeById(id);
diff --git a/src/main/java/com/peanut/modules/master/service/impl/CourseSociologyServiceImpl.java b/src/main/java/com/peanut/modules/master/service/impl/CourseSociologyServiceImpl.java
index 167f11d4..7e857d31 100644
--- a/src/main/java/com/peanut/modules/master/service/impl/CourseSociologyServiceImpl.java
+++ b/src/main/java/com/peanut/modules/master/service/impl/CourseSociologyServiceImpl.java
@@ -29,13 +29,13 @@ public class CourseSociologyServiceImpl extends ServiceImpl<CourseSociologyDao,
     @Override
     public R delCourseSociology(int id) {
         //查看下一级是否存在
-        CourseSociologyEntity one = this.getOne(new LambdaQueryWrapper<CourseSociologyEntity>().eq(CourseSociologyEntity::getPid, id));
-        if(one!=null){
+        int count = this.count(new LambdaQueryWrapper<CourseSociologyEntity>().eq(CourseSociologyEntity::getPid, id));
+        if(count>0){
             return R.error(501,"删除失败，请先删除子项目后再尝试");
         }
         //查看绑定关系是否存在
-        CourseToSociologyEntity courseToSociologyEntity = courseToSociologyDao.selectOne(new LambdaQueryWrapper<CourseToSociologyEntity>().eq(CourseToSociologyEntity::getSociologyId, id));
-        if(courseToSociologyEntity!=null){
+        Integer integer = courseToSociologyDao.selectCount(new LambdaQueryWrapper<CourseToSociologyEntity>().eq(CourseToSociologyEntity::getSociologyId, id));
+        if(integer>0){
             return R.error(502,"删除失败，请先解绑课程与国学标签的绑定关系");
         }
         this.removeById(id);