diff --git a/app/models/merchant_product.py b/app/models/merchant_product.py
index 62792b9..9330cc7 100644
--- a/app/models/merchant_product.py
+++ b/app/models/merchant_product.py
@@ -25,6 +25,7 @@ class MerchantProductDB(Base):
     tags = Column(String(200))                     # 标签，逗号分隔
     purchase_limit = Column(Integer, nullable=False, default=0)  # 限购次数，0表示不限购
     gift_points_rate = Column(DECIMAL(4,2), nullable=False, default=0.00)  # 购买赠送积分比例，默认0%
+    promotion_text = Column(String(100))  # 促销文本
     create_time = Column(DateTime(timezone=True), server_default=func.now())
     update_time = Column(DateTime(timezone=True), onupdate=func.now())
     status = Column(Enum(ProductStatus), nullable=False, default=ProductStatus.UNLISTING)
@@ -41,6 +42,7 @@ class MerchantProductCreate(BaseModel):
     tags: str = Field("", max_length=200)
     purchase_limit: int = Field(0, ge=0)  # 限购次数，默认0表示不限购
     status: ProductStatus = ProductStatus.UNLISTING
+    promotion_text: Optional[str] = Field(None, max_length=100)  # 促销文本
     gift_points_rate: Optional[float] = Field(10.00, ge=0, le=100)  # 购买赠送积分比例
 
 class MerchantProductUpdate(BaseModel):
@@ -52,6 +54,7 @@ class MerchantProductUpdate(BaseModel):
     tags: Optional[str] = Field(None, max_length=200)
     purchase_limit: Optional[int] = Field(None, ge=0)  # 限购次数，可选字段
     status: Optional[ProductStatus] = None
+    promotion_text: Optional[str] = Field(None, max_length=100)  # 促销文本
     gift_points_rate: Optional[float] = Field(None, ge=0, le=100)  # 购买赠送积分比例
 
 class MerchantProductInfo(BaseModel):
@@ -66,6 +69,7 @@ class MerchantProductInfo(BaseModel):
     tags: str
     purchase_limit: int  # 限购次数
     gift_points_rate: float
+    promotion_text: Optional[str] = None  # 促销文本
     create_time: datetime
     update_time: Optional[datetime]
     status: ProductStatus