diff --git a/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareDTO.java b/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareDTO.java
index 2d894a9a..60014e74 100644
--- a/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareDTO.java
+++ b/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareDTO.java
@@ -3,6 +3,8 @@ package org.qinan.cedu.model.dto;
 import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 
+import java.math.BigDecimal;
+
 /**
  * 课程关联课件表
  * @TableName course_rel_courseware
@@ -44,4 +46,10 @@ public class CourseRelCoursewareDTO {
      */
     @ApiModelProperty("排序")
     private Integer sort;
+
+    /**
+     * 课时时长（小时）
+     */
+    @ApiModelProperty("课时时长（小时）")
+    private BigDecimal classHourDuration;
 }
\ No newline at end of file
diff --git a/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareVO.java b/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareVO.java
index 4fda6601..c32933ad 100644
--- a/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareVO.java
+++ b/safety-cedu-service/src/main/java/org/qinan/cedu/model/dto/CourseRelCoursewareVO.java
@@ -3,6 +3,8 @@ package org.qinan.cedu.model.dto;
 import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 
+import java.math.BigDecimal;
+
 /**
  * 课程关联课件表
  * @TableName course_rel_courseware
@@ -39,4 +41,10 @@ public class CourseRelCoursewareVO {
      */
     @ApiModelProperty("排序")
     private Integer sort;
+
+    /**
+     * 课时时长（小时）
+     */
+    @ApiModelProperty("课时时长（小时）")
+    private BigDecimal classHourDuration;
 }
\ No newline at end of file
diff --git a/safety-cedu-service/src/main/java/org/qinan/cedu/model/entity/CourseRelCoursewareDO.java b/safety-cedu-service/src/main/java/org/qinan/cedu/model/entity/CourseRelCoursewareDO.java
index 17de5154..4d6159cd 100644
--- a/safety-cedu-service/src/main/java/org/qinan/cedu/model/entity/CourseRelCoursewareDO.java
+++ b/safety-cedu-service/src/main/java/org/qinan/cedu/model/entity/CourseRelCoursewareDO.java
@@ -5,6 +5,8 @@ import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
 import lombok.Data;
 
+import java.math.BigDecimal;
+
 /**
  * 课程关联课件表
  * @TableName course_rel_courseware
@@ -47,4 +49,10 @@ public class CourseRelCoursewareDO {
      */
     @TableField(value = "sort")
     private Integer sort;
+
+    /**
+     * 课时时长（小时）
+     */
+    @TableField(value = "class_hour_duration")
+    private BigDecimal classHourDuration;
 }
\ No newline at end of file
diff --git a/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CourseManagementServiceImpl.java b/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CourseManagementServiceImpl.java
index 7124423f..e9b5fac3 100644
--- a/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CourseManagementServiceImpl.java
+++ b/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CourseManagementServiceImpl.java
@@ -10,10 +10,10 @@ import org.qinan.cedu.enums.DeleteEnum;
 import org.qinan.cedu.mapper.CourseManagementMapper;
 import org.qinan.cedu.mapper.CourseRelCoursewareMapper;
 import org.qinan.cedu.model.dto.CourseManagementDTO;
-import org.qinan.cedu.model.query.CourseManagementPageQuery;
 import org.qinan.cedu.model.dto.CourseManagementVO;
 import org.qinan.cedu.model.entity.CourseManagementDO;
 import org.qinan.cedu.model.entity.CourseRelCoursewareDO;
+import org.qinan.cedu.model.query.CourseManagementPageQuery;
 import org.qinan.cedu.service.CourseManagementService;
 import org.qinan.safetyeval.infrastructure.support.InsertFieldDefaults;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -21,8 +21,10 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.StringUtils;
 
+import java.math.BigDecimal;
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * 课程管理服务实现
@@ -84,8 +86,12 @@ public class CourseManagementServiceImpl extends ServiceImpl<CourseManagementMap
         if (entity.getUsed() == null) {
             entity.setUsed(0);
         }
-        this.save(entity);
         List<CourseRelCoursewareDO> courseRelCoursewareDOS = courseRelCoursewareConvertor.convertDtoListToEList(dto.getCourseRelCoursewareDTOList());
+        if (entity.getClassHourDuration() == null) {
+            entity.setClassHourDuration(courseRelCoursewareDOS.stream().map(CourseRelCoursewareDO::getClassHourDuration).filter(Objects::nonNull)
+                    .reduce(BigDecimal.ZERO, BigDecimal::add));
+        }
+        this.save(entity);
         for (CourseRelCoursewareDO courseRelCoursewareDO : courseRelCoursewareDOS) {
             courseRelCoursewareDO.setCourseId(entity.getId());
             courseRelCoursewareMapper.insert(courseRelCoursewareDO);
@@ -98,10 +104,14 @@ public class CourseManagementServiceImpl extends ServiceImpl<CourseManagementMap
     public boolean updateCourse(CourseManagementDTO dto) {
         CourseManagementDO entity = courseManagementConvertor.convertDtoToE(dto);
         InsertFieldDefaults.applyForUpdateIgnoreOrgId(entity);
-        this.updateById(entity);
         courseRelCoursewareMapper.delete(new LambdaQueryWrapper<CourseRelCoursewareDO>()
                 .eq(CourseRelCoursewareDO::getCourseId, entity.getId()));
         List<CourseRelCoursewareDO> courseRelCoursewareDOS = courseRelCoursewareConvertor.convertDtoListToEList(dto.getCourseRelCoursewareDTOList());
+        if (entity.getClassHourDuration() == null) {
+            entity.setClassHourDuration(courseRelCoursewareDOS.stream().map(CourseRelCoursewareDO::getClassHourDuration).filter(Objects::nonNull)
+                    .reduce(BigDecimal.ZERO, BigDecimal::add));
+        }
+        this.updateById(entity);
         for (CourseRelCoursewareDO courseRelCoursewareDO : courseRelCoursewareDOS) {
             courseRelCoursewareDO.setCourseId(entity.getId());
             courseRelCoursewareMapper.insert(courseRelCoursewareDO);
diff --git a/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java b/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java
index 29d1aa7a..91527da5 100644
--- a/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java
+++ b/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java
@@ -19,6 +19,8 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.util.StringUtils;
 
+import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.time.LocalDateTime;
 
 /**
@@ -65,6 +67,10 @@ public class CoursewareManagementServiceImpl extends ServiceImpl<CoursewareManag
     public boolean saveCourseware(CoursewareManagementDTO dto) {
         CoursewareManagementDO entity = coursewareManagementConvertor.convertDtoToE(dto);
         InsertFieldDefaults.applyIgnoreOrgId(entity);
+        if (dto.getClassHourDuration() != null) {
+            entity.setClassHourDuration(dto.getClassHourDuration());
+            entity.setCreditHours(dto.getClassHourDuration().divide(new BigDecimal("45"), 1, RoundingMode.HALF_UP));
+        }
         return this.save(entity);
     }
 
@@ -72,6 +78,10 @@ public class CoursewareManagementServiceImpl extends ServiceImpl<CoursewareManag
     public boolean updateCourseware(CoursewareManagementDTO dto) {
         CoursewareManagementDO entity = coursewareManagementConvertor.convertDtoToE(dto);
         InsertFieldDefaults.applyForUpdateIgnoreOrgId(entity);
+        if (dto.getClassHourDuration() != null) {
+            entity.setClassHourDuration(dto.getClassHourDuration());
+            entity.setCreditHours(dto.getClassHourDuration().divide(new BigDecimal("45"), 1, RoundingMode.HALF_UP));
+        }
         return this.updateById(entity);
     }