diff --git a/app/api/endpoints/order.py b/app/api/endpoints/order.py
index 9c5b0be..b93d6d4 100644
--- a/app/api/endpoints/order.py
+++ b/app/api/endpoints/order.py
@@ -395,6 +395,8 @@ async def get_order_detail(
     deliveryman_share = 0 
     if current_user.delivery_commission_rate is not None:
         deliveryman_share = round(order.original_amount * (current_user.delivery_commission_rate / 100.0), 2)
+    if current_user.delivery_commission_fixed is not None:
+        deliveryman_share = current_user.delivery_commission_fixed
 
     # 如果有配送员 id，则获取配送员信息
     if order.deliveryman_user_id:
@@ -1064,7 +1066,10 @@ async def deliveryman_complete_order(
         order.completed_time = datetime.now()
         
         # 计算配送员分账金额
-        deliveryman_share = order.original_amount * current_user.delivery_commission_rate / 100
+        if current_user.delivery_commission_rate is not None:
+            deliveryman_share = order.original_amount * current_user.delivery_commission_rate / 100
+        else:
+            deliveryman_share = current_user.delivery_commission_fixed
             
         # 使用账户管理器处理分账
         account_manager = AccountManager(db)
diff --git a/app/api/endpoints/user.py b/app/api/endpoints/user.py
index b001715..f9dbabb 100644
--- a/app/api/endpoints/user.py
+++ b/app/api/endpoints/user.py
@@ -23,7 +23,7 @@ from app.models.user_auth import UserAuthDB, UserAuthCreate, UserAuthInfo
 from app.core.qcloud import qcloud_manager
 from app.models.merchant import MerchantDB
 from app.models.address import AddressDB, AddressInfo
-from app.models.user import UserUpdateRoles, UserUpdateDeliveryCommissionRate
+from app.models.user import UserUpdateRoles, UserUpdateDeliveryCommission
 from app.models.order import ShippingOrderDB, OrderStatus
 from app.core.redis_client import redis_client
 
@@ -243,9 +243,9 @@ async def update_user_info(
         db.rollback()
         return error_response(code=500, message=f"更新失败: {str(e)}") 
     
-@router.put("/delivery-commission-rate", response_model=ResponseModel)
-async def update_delivery_commission_rate(
-    update_data: UserUpdateDeliveryCommissionRate,
+@router.put("/delivery-commission", response_model=ResponseModel)
+async def update_delivery_commission(
+    update_data: UserUpdateDeliveryCommission,
     db: Session = Depends(get_db),
     current_user: UserDB = Depends(get_admin_user)
 ):
@@ -255,7 +255,11 @@ async def update_delivery_commission_rate(
     if not user:
         return error_response(code=404, message="用户不存在")
     
-    user.delivery_commission_rate = update_data.delivery_commission_rate
+    if update_data.delivery_commission_rate:
+        user.delivery_commission_rate = update_data.delivery_commission_rate
+
+    if update_data.delivery_commission_fixed:
+        user.delivery_commission_fixed = update_data.delivery_commission_fixed
     db.commit()
     db.refresh(user)
     
diff --git a/app/models/user.py b/app/models/user.py
index 1b2d80f..5e1376a 100644
--- a/app/models/user.py
+++ b/app/models/user.py
@@ -50,6 +50,7 @@ class UserDB(Base):
     community_id = Column(Integer, ForeignKey("communities.id"), nullable=True)  # 归属小区
     is_auth = Column(Boolean, nullable=False, default=False)
     delivery_commission_rate = Column(Integer, nullable=False, default=0) # 配送佣金比例
+    delivery_commission_fixed = Column(DECIMAL(10, 2), nullable=False, default=0) # 配送佣金固定金额
 
     @property
     def optimized_avatar(self):
@@ -83,6 +84,7 @@ class UserInfo(BaseModel):
     community_name: Optional[str] = None
     is_auth: bool = False
     delivery_commission_rate: Optional[int] = None
+    delivery_commission_fixed: Optional[float] = None
     
     class Config:
         from_attributes = True
@@ -119,9 +121,10 @@ class UserUpdateRoles(BaseModel):
     user_id: int
     roles: List[UserRole]
 
-class UserUpdateDeliveryCommissionRate(BaseModel):
+class UserUpdateDeliveryCommission(BaseModel):
     user_id: int
-    delivery_commission_rate: int
+    delivery_commission_rate: Optional[int] = None
+    delivery_commission_fixed: Optional[float] = None
 
 def generate_user_code(db=None) -> str:
     """生成6位大写字母+数字的用户编码"""