diff --git a/service/fsservice.proto b/service/fsservice.proto
index e305606..3ea6f68 100644
--- a/service/fsservice.proto
+++ b/service/fsservice.proto
@@ -138,6 +138,13 @@ service product {
             get: "/api/product/tag_product_list"
         };
     }
+    //计算产品价格
+    rpc CalculateProductPrice(CalculateProductPriceReq) returns (CalculateProductPriceRsp) {
+        option (google.api.http) = {
+            post: "/api/product/calculate_product_price"
+            body: "*"
+        };
+    }
 }
 
 message UserInfoRequest {
@@ -241,4 +248,22 @@ message GetProductListReq{
     int64   merchant_type = 2; //商户类型
     string  template_tag = 3;  //模板标签
     bool    with_product = 4;  //是否携带分类下的产品
+}
+//计算产品价格
+message CalculateProductPriceReq{
+    int64 product_id = 1;
+    int64 size_id = 2;
+    int64 fitting_id = 3;
+    int64 purchase_quantity = 4;
+}
+message CalculateProductPriceRsp{
+    string      item_price = 1;
+    string      total_price = 2;
+    StepRange   step_range = 3;
+}
+message StepRange{
+    int64   start = 1;//起点
+    int64   end = 2;//终点
+    string  range_description = 3;//描述
+    string  item_price = 4;//单价
 }
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