diff --git a/reading-platform-java/src/main/java/com/reading/platform/entity/BaseEntity.java b/reading-platform-java/src/main/java/com/reading/platform/entity/BaseEntity.java
index 56d7fb0..09dc5f7 100644
--- a/reading-platform-java/src/main/java/com/reading/platform/entity/BaseEntity.java
+++ b/reading-platform-java/src/main/java/com/reading/platform/entity/BaseEntity.java
@@ -23,10 +23,10 @@ import java.time.LocalDateTime;
 public abstract class BaseEntity {
 
     /**
-     * 主键 ID（雪花算法生成）
+     * 主键 ID（数据库自增）
      */
     @Schema(description = "主键 ID")
-    @TableId(type = IdType.ASSIGN_ID)
+    @TableId(type = IdType.AUTO)
     private Long id;
 
     /**
diff --git a/reading-platform-java/src/main/resources/db/migration/V11__change_id_to_auto_increment.sql b/reading-platform-java/src/main/resources/db/migration/V11__change_id_to_auto_increment.sql
new file mode 100644
index 0000000..b5b43a3
--- /dev/null
+++ b/reading-platform-java/src/main/resources/db/migration/V11__change_id_to_auto_increment.sql
@@ -0,0 +1,237 @@
+-- =====================================================
+-- 幼儿园阅读平台数据库迁移脚本
+-- 版本：V11
+-- 创建时间：2026-03-16
+-- 描述：将所有表的 id 列改为数据库自增
+-- =====================================================
+
+-- 说明：由于 MySQL 不支持直接修改现有列为自增，
+-- 需要重建每张表的 id 列
+
+-- -----------------------------------------------------
+-- 1. 管理员用户表 (admin_user)
+-- -----------------------------------------------------
+ALTER TABLE `admin_user`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 2. 租户表 (tenant)
+-- -----------------------------------------------------
+ALTER TABLE `tenant`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 3. 教师表 (teacher)
+-- -----------------------------------------------------
+ALTER TABLE `teacher`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 4. 学生表 (student)
+-- -----------------------------------------------------
+ALTER TABLE `student`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 5. 家长表 (parent)
+-- -----------------------------------------------------
+ALTER TABLE `parent`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 6. 班级表 (clazz)
+-- -----------------------------------------------------
+ALTER TABLE `clazz`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 7. 班级教师关联表 (class_teacher)
+-- -----------------------------------------------------
+ALTER TABLE `class_teacher`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 8. 课程表 (course)
+-- -----------------------------------------------------
+ALTER TABLE `course`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 9. 课程套餐表 (course_package)
+-- -----------------------------------------------------
+ALTER TABLE `course_package`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 10. 套餐课程关联表 (course_package_course)
+-- -----------------------------------------------------
+ALTER TABLE `course_package_course`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 11. 主题表 (theme)
+-- -----------------------------------------------------
+ALTER TABLE `theme`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 12. 标签表 (tag)
+-- -----------------------------------------------------
+ALTER TABLE `tag`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 13. 课程版本表 (course_version)
+-- -----------------------------------------------------
+ALTER TABLE `course_version`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 14. 课程资源表 (course_resource)
+-- -----------------------------------------------------
+ALTER TABLE `course_resource`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 15. 课程脚本表 (course_script)
+-- -----------------------------------------------------
+ALTER TABLE `course_script`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 16. 课程脚本页面表 (course_script_page)
+-- -----------------------------------------------------
+ALTER TABLE `course_script_page`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 17. 课程活动表 (course_activity)
+-- -----------------------------------------------------
+ALTER TABLE `course_activity`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 18. 课程课时表 (course_lesson)
+-- -----------------------------------------------------
+ALTER TABLE `course_lesson`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 19. 课时步骤表 (lesson_step)
+-- -----------------------------------------------------
+ALTER TABLE `lesson_step`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 20. 课时步骤资源表 (lesson_step_resource)
+-- -----------------------------------------------------
+ALTER TABLE `lesson_step_resource`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 21. 课时反馈表 (lesson_feedback)
+-- -----------------------------------------------------
+ALTER TABLE `lesson_feedback`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 22. 任务表 (task)
+-- -----------------------------------------------------
+ALTER TABLE `task`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 23. 任务完成表 (task_completion)
+-- -----------------------------------------------------
+ALTER TABLE `task_completion`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 24. 任务目标表 (task_target)
+-- -----------------------------------------------------
+ALTER TABLE `task_target`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 25. 任务模板表 (task_template)
+-- -----------------------------------------------------
+ALTER TABLE `task_template`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 26. 成长记录表 (growth_record)
+-- -----------------------------------------------------
+ALTER TABLE `growth_record`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 27. 通知表 (notification)
+-- -----------------------------------------------------
+ALTER TABLE `notification`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 28. 家长学生关联表 (parent_student)
+-- -----------------------------------------------------
+ALTER TABLE `parent_student`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 29. 学生班级历史表 (student_class_history)
+-- -----------------------------------------------------
+ALTER TABLE `student_class_history`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 30. 学生记录表 (student_record)
+-- -----------------------------------------------------
+ALTER TABLE `student_record`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 31. 租户课程表 (tenant_course)
+-- -----------------------------------------------------
+ALTER TABLE `tenant_course`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 32. 租户套餐表 (tenant_package)
+-- -----------------------------------------------------
+ALTER TABLE `tenant_package`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 33. 系统设置表 (system_setting)
+-- -----------------------------------------------------
+ALTER TABLE `system_setting`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 34. 排课模板表 (schedule_template)
+-- -----------------------------------------------------
+ALTER TABLE `schedule_template`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 35. 排课计划表 (schedule_plan)
+-- -----------------------------------------------------
+ALTER TABLE `schedule_plan`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 36. 资源库表 (resource_library)
+-- -----------------------------------------------------
+ALTER TABLE `resource_library`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 37. 资源项表 (resource_item)
+-- -----------------------------------------------------
+ALTER TABLE `resource_item`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';
+
+-- -----------------------------------------------------
+-- 38. 操作日志表 (operation_log)
+-- -----------------------------------------------------
+ALTER TABLE `operation_log`
+    MODIFY COLUMN `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键 ID';