diff --git a/app/api/endpoints/merchant.py b/app/api/endpoints/merchant.py
index c19c2ec..69c8fb8 100644
--- a/app/api/endpoints/merchant.py
+++ b/app/api/endpoints/merchant.py
@@ -99,13 +99,22 @@ async def update_merchant(
 @router.get("/{merchant_id}", response_model=ResponseModel)
 async def get_merchant(
     merchant_id: int,
+    longitude: Optional[float] = None,
+    latitude: Optional[float] = None,
     db: Session = Depends(get_db)
 ):
     """获取商家详情"""
+    # 构建基础查询
     merchant = db.query(
         MerchantDB,
         UserDB.phone.label('user_phone'),
-        UserDB.nickname.label('user_nickname')
+        UserDB.nickname.label('user_nickname'),
+        text("CASE WHEN :lat IS NOT NULL AND :lon IS NOT NULL THEN "
+             "ST_Distance_Sphere(point(longitude, latitude), point(:lon, :lat)) "
+             "ELSE NULL END as distance").params(
+                 lat=latitude, 
+                 lon=longitude
+             ) if longitude and latitude else text("NULL as distance")
     ).join(
         UserDB,
         MerchantDB.user_id == UserDB.userid
@@ -121,7 +130,8 @@ async def get_merchant(
     merchant_data = merchant_info.model_dump()
     merchant_data.update({
         'user_phone': merchant.user_phone,
-        'user_nickname': merchant.user_nickname
+        'user_nickname': merchant.user_nickname,
+        'distance': round(merchant.distance) if merchant.distance else None
     })
     
     return success_response(data=merchant_data)
@@ -207,7 +217,8 @@ async def list_merchants(
                 "product_name": product.name,
                 "product_image": product.optimized_image_url,
                 "product_price": float(product.sale_price),
-                "purchase_limit": product.purchase_limit
+                "purchase_limit": product.purchase_limit,
+                "promotion_text": product.promotion_text
             }
 
     # 处理返回结果