diff --git a/src/main/java/com/peanut/modules/common/dao/ClassExamOptionDao.java b/src/main/java/com/peanut/modules/common/dao/ClassExamOptionDao.java
index 87a2666..eec9dde 100644
--- a/src/main/java/com/peanut/modules/common/dao/ClassExamOptionDao.java
+++ b/src/main/java/com/peanut/modules/common/dao/ClassExamOptionDao.java
@@ -2,9 +2,12 @@ package com.peanut.modules.common.dao;
 
 import com.github.yulichang.base.MPJBaseMapper;
 import com.peanut.modules.common.entity.ClassExamOption;
+import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Mapper;
 
 @Mapper
 public interface ClassExamOptionDao extends MPJBaseMapper<ClassExamOption> {
+    @Delete("DELETE FROM class_exam_option WHERE subject_id = #{subjectId}")
+    int realDeleteClassExamOption(int subjectId);
 }
 
diff --git a/src/main/java/com/peanut/modules/common/service/impl/ClassExamServiceImpl.java b/src/main/java/com/peanut/modules/common/service/impl/ClassExamServiceImpl.java
index 539a145..923602a 100644
--- a/src/main/java/com/peanut/modules/common/service/impl/ClassExamServiceImpl.java
+++ b/src/main/java/com/peanut/modules/common/service/impl/ClassExamServiceImpl.java
@@ -74,7 +74,7 @@ public class ClassExamServiceImpl extends ServiceImpl<ClassExamDao, ClassExam> i
     public void updateClassExamSubject(ClassExamSubject classExamSubject) {
         classExamSubjectDao.updateById(classExamSubject);
         if (classExamSubject.getOptions()!=null&&classExamSubject.getOptions().size() > 0){
-            classExamOptionDao.delete(new LambdaQueryWrapper<ClassExamOption>().eq(ClassExamOption::getSubjectId,classExamSubject.getId()));
+            classExamOptionDao.realDeleteClassExamOption(classExamSubject.getId());
             for (ClassExamOption option:classExamSubject.getOptions()){
                 option.setSubjectId(classExamSubject.getId());
                 classExamOptionDao.insert(option);