diff --git a/apps/server/src/sync/sync.controller.ts b/apps/server/src/sync/sync.controller.ts
index 09b034f..7fda1bb 100644
--- a/apps/server/src/sync/sync.controller.ts
+++ b/apps/server/src/sync/sync.controller.ts
@@ -54,7 +54,7 @@ export class SyncController {
   @Post('dingtalk/import-users')
   @RequirePermission('sync:trigger')
   async importDingTalkUsers(@Body() body: ImportUsersDto) {
-    const result = await this.syncService.importDingTalkUsers(body.users);
+    const result = await this.syncService.importDingTalkUsers(body.users, body.classes);
     return { success: true, ...result };
   }
 
diff --git a/apps/server/src/sync/sync.module.ts b/apps/server/src/sync/sync.module.ts
index ae0b92e..d7b8ff7 100644
--- a/apps/server/src/sync/sync.module.ts
+++ b/apps/server/src/sync/sync.module.ts
@@ -13,6 +13,8 @@ import {
   User,
   Student,
   Role,
+  Class,
+  ClassStudent,
 } from '../entities';
 import { SyncService } from './sync.service';
 import { SyncController } from './sync.controller';
@@ -31,6 +33,8 @@ import { ScheduleSyncService } from './schedule-sync.service';
       User,
       Student,
       Role,
+      Class,
+      ClassStudent,
     ]),
     IntegrationModule,
     AttendanceModule,
diff --git a/apps/server/src/sync/sync.service.ts b/apps/server/src/sync/sync.service.ts
index 54a6422..8089dda 100644
--- a/apps/server/src/sync/sync.service.ts
+++ b/apps/server/src/sync/sync.service.ts
@@ -1,7 +1,8 @@
-import { Injectable, Logger } from '@nestjs/common';
+import { BadRequestException, Injectable, Logger } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { DataSource, Repository } from 'typeorm';
-import { SyncLog, SyncState, UserDingMapping } from '../entities';
+import { SyncLog, SyncState, UserDingMapping, ClassStudent, ClassTeacher } from '../entities';
+import { Class as ClassEntity } from '../entities/class.entity';
 import type { SyncPlatform, SyncType, SyncStatus } from '../entities/sync-log.entity';
 import { DingTalkService } from '../integration/dingtalk.service';
 import { WeComService } from '../integration/wecom.service';
@@ -11,12 +12,14 @@ import { User } from '../entities/user.entity';
 import { Student } from '../entities/student.entity';
 import { Role } from '../entities/role.entity';
 import * as bcrypt from 'bcryptjs';
+import type { ImportClassItemDto } from './dto/import-users.dto';
 
 export interface ImportUserDto {
   dingUserId: string;
   name: string;
   mobile: string;
   roleId: number | null;
+  dingDeptIds: number[];
 }
 
 @Injectable()
@@ -35,6 +38,10 @@ export class SyncService {
     private readonly studentRepo: Repository<Student>,
     @InjectRepository(Role)
     private readonly roleRepo: Repository<Role>,
+    @InjectRepository(ClassEntity)
+    private readonly classRepo: Repository<ClassEntity>,
+    @InjectRepository(ClassStudent)
+    private readonly classStudentRepo: Repository<ClassStudent>,
     private readonly dingTalkService: DingTalkService,
     private readonly weComService: WeComService,
     private readonly attendanceImportService: AttendanceImportService,
@@ -117,85 +124,147 @@ export class SyncService {
 
   /**
    * 从钉钉导入用户：roleId 非 null → 老师（User + 指定角色），roleId null → 学生（User + Student）。
+   * 支持同时创建班级并建立师生关联。
    * 已存在 UserDingMapping 的记录跳过。
    */
-  async importDingTalkUsers(users: ImportUserDto[]): Promise<{
+  async importDingTalkUsers(
+    users: ImportUserDto[],
+    classes?: ImportClassItemDto[],
+  ): Promise<{
     teacherCount: number;
     studentCount: number;
+    classCount: number;
     skipped: number;
     warnings: string[];
   }> {
-    let teacherCount = 0;
-    let studentCount = 0;
-    let skipped = 0;
+    const classItems = classes ?? [];
     const warnings: string[] = [];
 
-    for (const u of users) {
-      const existing = await this.mappingRepo.findOne({
-        where: { dingUserId: u.dingUserId },
-      });
-      if (existing) {
-        skipped++;
-        continue;
-      }
-
-      try {
-        await this.dataSource.transaction(async (manager) => {
-          const username = `dd_${u.dingUserId}`;
-          const passwordHash = await bcrypt.hash('123456', 10);
-
-          const user = manager.create(User, {
-            username,
-            name: u.name,
-            passwordHash,
-            isActive: true,
-          });
-          await manager.save(user);
-
-          if (u.roleId != null) {
-            const role = await manager.findOne(Role, { where: { id: u.roleId } });
-            if (role) {
-              user.roles = [role];
-              await manager.save(user);
-              teacherCount++;
-            } else {
-              const msg = `角色 id=${u.roleId} 不存在，跳过用户 ${u.name}(${u.dingUserId})`;
-              this.logger.warn(msg);
-              warnings.push(msg);
-              skipped++;
-              throw new Error('SKIP_USER');
-            }
-          } else {
-            const student = manager.create(Student, {
-              name: u.name,
-              phone: u.mobile || undefined,
-              userId: user.id,
-              status: 'active',
-            });
-            await manager.save(student);
-            studentCount++;
-          }
-
-          const mapping = manager.create(UserDingMapping, {
-            dingUserId: u.dingUserId,
-            userId: user.id,
-            dingName: u.name,
-            dingMobile: u.mobile,
-          });
-          await manager.save(mapping);
-        });
-      } catch (err: unknown) {
-        const msg = err instanceof Error ? err.message : String(err);
-        if (msg !== 'SKIP_USER') {
-          this.logger.error(`导入用户 ${u.name}(${u.dingUserId}) 失败: ${msg}`);
-        }
+    // 预检查班级编码重复
+    if (classItems.length > 0) {
+      const codes = classItems.map((c) => c.code);
+      const existing = await this.classRepo.find({ where: codes.map((code) => ({ code })) });
+      if (existing.length > 0) {
+        const dup = existing.map((c) => c.code).join(', ');
+        throw new BadRequestException(`班级编码已存在: ${dup}`);
       }
     }
 
+    let teacherCount = 0;
+    let studentCount = 0;
+    let skipped = 0;
+
+    await this.dataSource.transaction(async (manager) => {
+      // 1. 创建班级
+      const deptClassMap = new Map<number, number>(); // deptId -> classId
+      for (const c of classItems) {
+        // ponytail: Class keyword conflicts with TypeORM DeepPartial resolution
+        const result = await manager.save(ClassEntity, {
+          name: c.name,
+          code: c.code,
+          classType: c.classType,
+          startDate: c.startDate ?? null,
+          endDate: c.endDate ?? null,
+          maxStudents: c.maxStudents ?? 0,
+          notes: c.notes ?? null,
+        } as unknown as Record<string, unknown>);
+        deptClassMap.set(c.deptId, (result as ClassEntity).id);
+      }
+
+      // 2. 导入用户（逐用户）
+      for (const u of users) {
+        const existingMapping = await manager.findOne(UserDingMapping, {
+          where: { dingUserId: u.dingUserId },
+        });
+        if (existingMapping) {
+          skipped++;
+          continue;
+        }
+
+        const username = `dd_${u.dingUserId}`;
+        const passwordHash = await bcrypt.hash('123456', 10);
+
+        const user = manager.create(User, {
+          username,
+          name: u.name,
+          passwordHash,
+          isActive: true,
+        });
+        await manager.save(user);
+
+        let isTeacher = false;
+
+        if (u.roleId != null) {
+          const role = await manager.findOne(Role, { where: { id: u.roleId } });
+          if (!role) {
+            throw new BadRequestException(`角色 id=${u.roleId} 不存在`);
+          }
+          user.roles = [role];
+          await manager.save(user);
+          isTeacher = true;
+          teacherCount++;
+        } else {
+          const student = manager.create(Student, {
+            name: u.name,
+            phone: u.mobile || undefined,
+            userId: user.id,
+            status: 'active',
+          });
+          await manager.save(student);
+          studentCount++;
+        }
+
+        // 钉钉映射
+        const mapping = manager.create(UserDingMapping, {
+          dingUserId: u.dingUserId,
+          userId: user.id,
+          dingName: u.name,
+          dingMobile: u.mobile,
+        });
+        await manager.save(mapping);
+
+        // 3. 建立班级关联
+        if (classItems.length > 0 && u.dingDeptIds?.length > 0) {
+          for (const deptId of u.dingDeptIds) {
+            const classId = deptClassMap.get(deptId);
+            if (!classId) continue; // 该部门未标为班级
+
+            if (isTeacher) {
+              const ct = manager.create(ClassTeacher, {
+                classId,
+                userId: user.id,
+                roleType: 'teacher',
+              });
+              await manager.save(ct);
+            } else {
+              const studentRecord = await manager.findOne(Student, { where: { userId: user.id } });
+              if (!studentRecord) continue;
+              const cs = manager.create(ClassStudent, {
+                classId,
+                studentId: studentRecord.id,
+                status: 'active',
+              });
+              await manager.save(cs);
+            }
+          }
+        }
+      }
+
+      // 4. 检查空班级
+      for (const [deptId, classId] of deptClassMap) {
+        const tc = await manager.count(ClassTeacher, { where: { classId } });
+        const sc = await manager.count(ClassStudent, { where: { classId } });
+        if (tc === 0 && sc === 0) {
+          const cls = await this.classRepo.findOne({ where: { id: classId } });
+          warnings.push(`班级 "${cls?.name}" (deptId=${deptId}) 无任何师生`);
+        }
+      }
+    });
+
     this.logger.log(
-      `钉钉用户导入完成: ${teacherCount} 位老师, ${studentCount} 位学生, ${skipped} 跳过`,
+      `钉钉用户导入完成: ${teacherCount} 位老师, ${studentCount} 位学生, ${classItems.length} 个班级, ${skipped} 跳过`,
     );
-    return { teacherCount, studentCount, skipped, warnings };
+    return { teacherCount, studentCount, classCount: classItems.length, skipped, warnings };
   }
 
   // ── 排班同步 ──