diff --git a/app/api/endpoints/point_product_order.py b/app/api/endpoints/point_product_order.py
index 59c3d84..6a0dbf8 100644
--- a/app/api/endpoints/point_product_order.py
+++ b/app/api/endpoints/point_product_order.py
@@ -3,7 +3,6 @@ from sqlalchemy.orm import Session
 from app.models.point_product_order import (
     PointProductOrderDB,
     PointProductOrderCreate,
-    PointProductOrderUpdate,
     PointProductOrderInfo,
     PointProductOrderStatus
 )
@@ -15,9 +14,45 @@ from app.core.response import success_response, error_response, ResponseModel
 from app.core.point_manager import PointManager
 from typing import Optional
 from datetime import datetime
+from app.models.order import ShippingOrderDB, OrderStatus
 
 router = APIRouter()
 
+@router.get("/pre_order", response_model=ResponseModel)
+async def pre_order(
+    order: PointProductOrderCreate,
+    db: Session = Depends(get_db),
+    current_user: UserDB = Depends(get_current_user)
+):
+    """预下单"""
+
+    # 检查今日是否有配送订单
+    orders = db.query(ShippingOrderDB).filter(
+        ShippingOrderDB.userid == current_user.userid,
+        ShippingOrderDB.status.in_([OrderStatus.CREATED, OrderStatus.RECEIVED]),
+        ShippingOrderDB.create_time.date() == datetime.now().date()
+    ).all()
+
+    if len(orders) == 0:
+        return error_response(code=400, message="今日暂无配送订单")
+    
+    product = db.query(PointProductDB).filter(
+        PointProductDB.id == order.product_id,
+        PointProductDB.is_active == True
+    ).first()
+
+    if not product:
+        return error_response(code=404, message="商品不存在或已下架")
+    
+    # 计算所需总积分
+    order_point_amount = product.point_amount * order.quantity
+
+    return success_response(data={
+        "order_point_amount": order_point_amount,
+        "orders": orders
+    })
+
+
 @router.post("", response_model=ResponseModel)
 async def create_point_product_order(
     order: PointProductOrderCreate,
@@ -41,6 +76,24 @@ async def create_point_product_order(
     if current_user.points < total_points:
         return error_response(code=400, message="积分不足")
     
+    # 检查配送订单是否存在
+    if order.delivery_order_id is None:
+        return error_response(code=400, message="配送订单不能为空")
+
+
+    delivery_order = db.query(ShippingOrderDB).filter(
+        ShippingOrderDB.orderid == order.delivery_order_id,
+        ShippingOrderDB.status.in_([OrderStatus.CREATED, OrderStatus.RECEIVED]),
+        ShippingOrderDB.create_time.date() == datetime.now().date()
+    ).first()
+
+    if not delivery_order:
+        return error_response(code=404, message="配送订单不存在")
+    
+    # 检查配送订单是否已支付
+    if delivery_order.status != OrderStatus.UNPAID:
+        return error_response(code=400, message="配送订单已支付")
+    
     # 创建订单
     db_order = PointProductOrderDB(
         orderid=PointProductOrderDB.generate_order_id(),
@@ -51,24 +104,27 @@ async def create_point_product_order(
         product_description=product.description,
         product_point_amount=product.point_amount,
         quantity=order.quantity,
-        order_point_amount=total_points
+        order_point_amount=total_points,
+        delivery_order_id=order.delivery_order_id,
+        status=PointProductOrderStatus.PENDING
     )
     
     try:
+        # 保存订单
+        db.add(db_order)
+        db.commit()
+        
+        db.refresh(db_order)
+
         # 扣减用户积分
         point_manager = PointManager(db)
         point_manager.deduct_points(
             user_id=current_user.userid,
             points=total_points,
-            description=f"兑换商品: {product.name}",
+            description=f"兑换积分商品",
             order_id=db_order.orderid
         )
-        
-        # 保存订单
-        db.add(db_order)
-        db.commit()
-        db.refresh(db_order)
-        
+
         return success_response(data=PointProductOrderInfo.model_validate(db_order))
     except Exception as e:
         db.rollback()
diff --git a/app/core/utils.py b/app/core/utils.py
index 4c9853a..823ef40 100644
--- a/app/core/utils.py
+++ b/app/core/utils.py
@@ -19,7 +19,7 @@ class CommonUtils:
     def generate_order_id(prefix: str) -> str:
         """
         生成订单号
-        :param prefix: 订单前缀，如 M(商品订单)、P(支付订单)、D(配送订单)
+        :param prefix: 订单前缀，如 M(商品订单)、P(支付订单)、D(配送订单)、E(积分兑换商品订单)
         :return: 15位订单号：前缀(1位) + 日期(8位) + 时间戳(6位)
         """
         now = datetime.now()
diff --git a/app/models/point_product_order.py b/app/models/point_product_order.py
index 953fa82..ce4a91b 100644
--- a/app/models/point_product_order.py
+++ b/app/models/point_product_order.py
@@ -43,12 +43,13 @@ class PointProductOrderDB(Base):
     @staticmethod
     def generate_order_id() -> str:
         """生成订单号"""
-        return CommonUtils.generate_order_id("P")  # P代表积分商品订单
+        return CommonUtils.generate_order_id("E")  # E代表积分兑换商品订单
 
 # Pydantic 模型
 class PointProductOrderCreate(BaseModel):
     product_id: int
     quantity: int = Field(default=1, gt=0)
+    delivery_order_id: Optional[str] = None
 
 class PointProductOrderUpdate(BaseModel):
     status: PointProductOrderStatus