diff --git a/backend/.env.example b/backend/.env.example
index d24964b..8e32c11 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -6,3 +6,8 @@ SECRET_KEY=kaopeilian-secret-key-dev
 CORS_ORIGINS=["http://localhost:3001","http://localhost:3000"]
 HOST=0.0.0.0
 PORT=8000
+
+# 自动同步配置
+AUTO_SYNC_ENABLED=true
+AUTO_SYNC_INTERVAL_MINUTES=30
+FULL_SYNC_HOUR=2
diff --git a/backend/app/api/v1/endpoints/employee_sync.py b/backend/app/api/v1/endpoints/employee_sync.py
index 50146b5..e626cc6 100644
--- a/backend/app/api/v1/endpoints/employee_sync.py
+++ b/backend/app/api/v1/endpoints/employee_sync.py
@@ -234,3 +234,95 @@ async def get_sync_status(
             detail=f"查询统计信息失败: {str(e)}"
         )
 
+
+@router.get("/scheduler/jobs", summary="查看定时同步任务")
+async def get_scheduler_jobs(
+    *,
+    current_user: User = Depends(get_current_user)
+) -> Dict[str, Any]:
+    """
+    查看定时同步任务列表
+    
+    权限要求: 仅管理员可查看
+    
+    Returns:
+        定时任务列表，包含下次执行时间等信息
+    """
+    if current_user.role != 'admin':
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="只有管理员可以查看定时任务"
+        )
+    
+    try:
+        from app.core.scheduler import scheduler_manager
+        
+        jobs = scheduler_manager.get_jobs()
+        
+        return {
+            "success": True,
+            "message": "获取定时任务成功",
+            "data": {
+                "auto_sync_enabled": scheduler_manager.AUTO_SYNC_ENABLED,
+                "incremental_sync_interval_minutes": scheduler_manager.INCREMENTAL_SYNC_INTERVAL_MINUTES,
+                "full_sync_hour": scheduler_manager.FULL_SYNC_HOUR,
+                "jobs": jobs
+            }
+        }
+    
+    except Exception as e:
+        logger.error(f"获取定时任务失败: {str(e)}")
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"获取定时任务失败: {str(e)}"
+        )
+
+
+@router.post("/scheduler/trigger/{job_id}", summary="手动触发定时任务")
+async def trigger_scheduler_job(
+    *,
+    job_id: str,
+    current_user: User = Depends(get_current_user)
+) -> Dict[str, Any]:
+    """
+    手动触发指定的定时任务
+    
+    权限要求: 仅管理员可执行
+    
+    Args:
+        job_id: 任务ID (employee_incremental_sync 或 employee_full_sync)
+    
+    Returns:
+        任务执行结果
+    """
+    if current_user.role != 'admin':
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="只有管理员可以触发定时任务"
+        )
+    
+    logger.info(f"管理员 {current_user.username} 手动触发定时任务: {job_id}")
+    
+    try:
+        from app.core.scheduler import scheduler_manager
+        
+        result = await scheduler_manager.trigger_job(job_id)
+        
+        return {
+            "success": True,
+            "message": f"任务 {job_id} 执行完成",
+            "data": result
+        }
+    
+    except ValueError as e:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=str(e)
+        )
+    except Exception as e:
+        logger.error(f"触发定时任务失败: {str(e)}")
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"触发定时任务失败: {str(e)}"
+        )
+
diff --git a/backend/app/core/database.py b/backend/app/core/database.py
index 7ae09a6..48559dc 100644
--- a/backend/app/core/database.py
+++ b/backend/app/core/database.py
@@ -29,3 +29,6 @@ AsyncSessionLocal = sessionmaker(
     class_=AsyncSession,
     expire_on_commit=False,
 )
+
+# 别名（用于调度器等模块）
+async_session_factory = AsyncSessionLocal
diff --git a/backend/app/core/scheduler.py b/backend/app/core/scheduler.py
new file mode 100644
index 0000000..c5ce461
--- /dev/null
+++ b/backend/app/core/scheduler.py
@@ -0,0 +1,242 @@
+"""
+定时任务调度模块
+
+使用 APScheduler 实现定时任务：
+- 通讯录增量同步（每30分钟）
+- 通讯录完整同步（每天凌晨2点）
+"""
+
+import os
+import asyncio
+from datetime import datetime
+from typing import Optional
+
+from apscheduler.schedulers.asyncio import AsyncIOScheduler
+from apscheduler.triggers.interval import IntervalTrigger
+from apscheduler.triggers.cron import CronTrigger
+from apscheduler.events import EVENT_JOB_ERROR, EVENT_JOB_EXECUTED
+
+from app.core.logger import logger
+
+
+class SchedulerManager:
+    """
+    定时任务调度管理器
+    
+    单例模式，统一管理所有定时任务
+    """
+    
+    _instance: Optional['SchedulerManager'] = None
+    _scheduler: Optional[AsyncIOScheduler] = None
+    _initialized: bool = False
+    
+    # 配置（可通过环境变量覆盖）
+    AUTO_SYNC_ENABLED: bool = True
+    INCREMENTAL_SYNC_INTERVAL_MINUTES: int = 30  # 增量同步间隔（分钟）
+    FULL_SYNC_HOUR: int = 2  # 完整同步执行时间（小时，24小时制）
+    
+    def __new__(cls):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+        return cls._instance
+    
+    @classmethod
+    def get_instance(cls) -> 'SchedulerManager':
+        """获取调度管理器实例"""
+        if cls._instance is None:
+            cls._instance = cls()
+        return cls._instance
+    
+    @classmethod
+    def _load_config(cls):
+        """从环境变量加载配置"""
+        cls.AUTO_SYNC_ENABLED = os.getenv('AUTO_SYNC_ENABLED', 'true').lower() == 'true'
+        cls.INCREMENTAL_SYNC_INTERVAL_MINUTES = int(os.getenv('AUTO_SYNC_INTERVAL_MINUTES', '30'))
+        cls.FULL_SYNC_HOUR = int(os.getenv('FULL_SYNC_HOUR', '2'))
+    
+    async def init(self, db_session_factory):
+        """
+        初始化调度器
+        
+        Args:
+            db_session_factory: 数据库会话工厂（async_sessionmaker）
+        """
+        if self._initialized:
+            logger.info("调度器已初始化，跳过")
+            return
+        
+        self._load_config()
+        
+        if not self.AUTO_SYNC_ENABLED:
+            logger.info("自动同步已禁用，调度器不启动")
+            return
+        
+        self._db_session_factory = db_session_factory
+        self._scheduler = AsyncIOScheduler(timezone='Asia/Shanghai')
+        
+        # 添加任务执行监听器
+        self._scheduler.add_listener(self._job_listener, EVENT_JOB_EXECUTED | EVENT_JOB_ERROR)
+        
+        # 注册定时任务
+        self._register_jobs()
+        
+        self._initialized = True
+        logger.info("调度器初始化完成")
+    
+    def _register_jobs(self):
+        """注册所有定时任务"""
+        if not self._scheduler:
+            return
+        
+        # 1. 增量同步任务（每30分钟）
+        self._scheduler.add_job(
+            self._run_incremental_sync,
+            IntervalTrigger(minutes=self.INCREMENTAL_SYNC_INTERVAL_MINUTES),
+            id='employee_incremental_sync',
+            name='员工增量同步',
+            replace_existing=True,
+            max_instances=1,  # 防止任务堆积
+        )
+        logger.info(f"已注册任务: 员工增量同步（每{self.INCREMENTAL_SYNC_INTERVAL_MINUTES}分钟）")
+        
+        # 2. 完整同步任务（每天凌晨2点）
+        self._scheduler.add_job(
+            self._run_full_sync,
+            CronTrigger(hour=self.FULL_SYNC_HOUR, minute=0),
+            id='employee_full_sync',
+            name='员工完整同步',
+            replace_existing=True,
+            max_instances=1,
+        )
+        logger.info(f"已注册任务: 员工完整同步（每天{self.FULL_SYNC_HOUR}:00）")
+    
+    def _job_listener(self, event):
+        """任务执行监听器"""
+        job_id = event.job_id
+        
+        if event.exception:
+            logger.error(
+                f"定时任务执行失败",
+                job_id=job_id,
+                error=str(event.exception),
+                traceback=event.traceback
+            )
+        else:
+            logger.info(
+                f"定时任务执行完成",
+                job_id=job_id,
+                return_value=str(event.retval) if event.retval else None
+            )
+    
+    async def _run_incremental_sync(self):
+        """执行增量同步"""
+        from app.services.employee_sync_service import EmployeeSyncService
+        
+        logger.info("开始执行定时增量同步任务")
+        start_time = datetime.now()
+        
+        try:
+            async with self._db_session_factory() as db:
+                async with EmployeeSyncService(db) as sync_service:
+                    stats = await sync_service.incremental_sync_employees()
+            
+            duration = (datetime.now() - start_time).total_seconds()
+            logger.info(
+                "定时增量同步完成",
+                duration_seconds=duration,
+                stats=stats
+            )
+            return stats
+            
+        except Exception as e:
+            logger.error(f"定时增量同步失败: {str(e)}")
+            raise
+    
+    async def _run_full_sync(self):
+        """执行完整同步"""
+        from app.services.employee_sync_service import EmployeeSyncService
+        
+        logger.info("开始执行定时完整同步任务")
+        start_time = datetime.now()
+        
+        try:
+            async with self._db_session_factory() as db:
+                async with EmployeeSyncService(db) as sync_service:
+                    stats = await sync_service.sync_employees()
+            
+            duration = (datetime.now() - start_time).total_seconds()
+            logger.info(
+                "定时完整同步完成",
+                duration_seconds=duration,
+                stats=stats
+            )
+            return stats
+            
+        except Exception as e:
+            logger.error(f"定时完整同步失败: {str(e)}")
+            raise
+    
+    def start(self):
+        """启动调度器"""
+        if not self._scheduler:
+            logger.warning("调度器未初始化，无法启动")
+            return
+        
+        if self._scheduler.running:
+            logger.info("调度器已在运行")
+            return
+        
+        self._scheduler.start()
+        logger.info("调度器已启动")
+        
+        # 打印已注册的任务
+        jobs = self._scheduler.get_jobs()
+        for job in jobs:
+            logger.info(f"  - {job.name} (ID: {job.id}, 下次执行: {job.next_run_time})")
+    
+    def stop(self):
+        """停止调度器"""
+        if self._scheduler and self._scheduler.running:
+            self._scheduler.shutdown(wait=True)
+            logger.info("调度器已停止")
+    
+    def get_jobs(self):
+        """获取所有任务列表"""
+        if not self._scheduler:
+            return []
+        
+        return [
+            {
+                'id': job.id,
+                'name': job.name,
+                'next_run_time': job.next_run_time.isoformat() if job.next_run_time else None,
+                'pending': job.pending,
+            }
+            for job in self._scheduler.get_jobs()
+        ]
+    
+    async def trigger_job(self, job_id: str):
+        """
+        手动触发任务
+        
+        Args:
+            job_id: 任务ID
+        """
+        if not self._scheduler:
+            raise RuntimeError("调度器未初始化")
+        
+        job = self._scheduler.get_job(job_id)
+        if not job:
+            raise ValueError(f"任务不存在: {job_id}")
+        
+        # 立即执行
+        if job_id == 'employee_incremental_sync':
+            return await self._run_incremental_sync()
+        elif job_id == 'employee_full_sync':
+            return await self._run_full_sync()
+        else:
+            raise ValueError(f"未知任务: {job_id}")
+
+
+# 全局调度管理器实例
+scheduler_manager = SchedulerManager.get_instance()
diff --git a/backend/app/main.py b/backend/app/main.py
index de2cb8b..2cc0e3c 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -34,10 +34,29 @@ async def lifespan(app: FastAPI):
         logger.info("Redis 初始化成功")
     except Exception as e:
         logger.warning(f"Redis 初始化失败（非致命）: {e}")
+    
+    # 初始化定时任务调度器
+    try:
+        from app.core.scheduler import scheduler_manager
+        from app.core.database import async_session_factory
+        
+        await scheduler_manager.init(async_session_factory)
+        scheduler_manager.start()
+        logger.info("定时任务调度器启动成功")
+    except Exception as e:
+        logger.warning(f"定时任务调度器启动失败（非致命）: {e}")
 
     yield
 
     # 关闭时执行
+    # 停止定时任务调度器
+    try:
+        from app.core.scheduler import scheduler_manager
+        scheduler_manager.stop()
+        logger.info("定时任务调度器已停止")
+    except Exception as e:
+        logger.warning(f"停止定时任务调度器失败: {e}")
+    
     try:
         from app.core.redis import close_redis
         await close_redis()
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 8b4b544..a5a5d8d 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -41,6 +41,9 @@ cozepy==0.19.0
 python-dateutil==2.8.2
 tenacity==8.2.3
 
+# 定时任务调度
+apscheduler==3.10.4
+
 # Excel文件处理（用于课程资料预览）
 openpyxl==3.1.2