diff --git a/app/Admin/Forms/DealerProductSaleRule.php b/app/Admin/Forms/DealerProductSaleRule.php
index 9476d324..9ed63a02 100644
--- a/app/Admin/Forms/DealerProductSaleRule.php
+++ b/app/Admin/Forms/DealerProductSaleRule.php
@@ -49,9 +49,8 @@ class DealerProductSaleRule extends Form implements LazyRenderable
                     $saleRules[] = new DealerProductSaleRuleModel($rule);
                 } else {
                     $_rule = DealerProductSaleRuleModel::find($rule['id']);
-                    $_rule['lvl'] = $rule['id'];
-                    $_rule['sale_price'] = $rule['sale_price'];
-                    $_rule['min_order_amount'] = $rule['min_order_amount'];
+                    $_rule['qty'] = $rule['qty'];
+                    $_rule['price'] = $rule['price'];
                     $saleRules[] = $_rule;
                 }
             }
diff --git a/app/Endpoint/Api/Http/Controllers/Dealer/OrderController.php b/app/Endpoint/Api/Http/Controllers/Dealer/OrderController.php
new file mode 100644
index 00000000..120ea9ca
--- /dev/null
+++ b/app/Endpoint/Api/Http/Controllers/Dealer/OrderController.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Endpoint\Api\Http\Controllers\Dealer;
+
+use App\Endpoint\Api\Http\Controllers\Controller;
+use App\Models\DealerProduct;
+use App\Services\Dealer\OrderService;
+use Illuminate\Http\Request;
+
+class OrderController extends Controller
+{
+    /**
+     * @param \Illuminate\Http\Request $request
+     * @return void
+     */
+    public function index(Request $request)
+    {
+    }
+
+    public function show($id, Request $request)
+    {
+    }
+
+    /**
+     * 计算订单价格
+     *
+     * @return void
+     */
+    public function totalAmount(Request $request, OrderService $orderService)
+    {
+        $input = $request->validate([
+            'product_id'=>['bail', 'required', 'int', 'min:0'],
+            'num'=>['bail', 'required', 'int', 'min:1'],
+        ]);
+
+        $product = DealerProduct::online()->findOrFail($input['product_id']);
+
+        return response()->json([
+            'total_amount'=> $orderService->totalAmount($request->user(), $product, $input['num']),
+        ]);
+    }
+}
diff --git a/app/Endpoint/Api/routes.php b/app/Endpoint/Api/routes.php
index 926d799c..2394f3bc 100644
--- a/app/Endpoint/Api/routes.php
+++ b/app/Endpoint/Api/routes.php
@@ -222,5 +222,8 @@ Route::group([
         Route::get('products', [Dealer\ProductController::class, 'index']);
         //商品详情
         Route::get('products/{id}', [Dealer\ProductController::class, 'show']);
+
+        //计算商品下单价格
+        Route::get('orders/total-amount', [Dealer\OrderController::class, 'totalAmount']);
     });
 });
diff --git a/app/Models/DealerProduct.php b/app/Models/DealerProduct.php
index 9a44b849..380fa2e2 100644
--- a/app/Models/DealerProduct.php
+++ b/app/Models/DealerProduct.php
@@ -29,7 +29,7 @@ class DealerProduct extends Model
 
     public function saleRules()
     {
-        return $this->hasMany(DealerProductSaleRule::class, 'product_id')->orderBy('qty', 'asc');
+        return $this->hasMany(DealerProductSaleRule::class, 'product_id')->orderBy('qty', 'desc');
     }
 
     public function manageRules()
diff --git a/app/Models/User.php b/app/Models/User.php
index 2a80d189..98ae27b4 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -127,6 +127,16 @@ class User extends Model implements AuthorizableContract, AuthenticatableContrac
         return $this->hasOne(UserCid::class, 'user_id');
     }
 
+    /**
+     * 属于次用户得经销商身份
+     *
+     * @return void
+     */
+    public function dealer()
+    {
+        return $this->hasOne(Dealer::class, 'user_id');
+    }
+
     /**
      * 确认此用户是否是 VIP
      *
diff --git a/app/Services/Dealer/OrderService.php b/app/Services/Dealer/OrderService.php
new file mode 100644
index 00000000..d8177fed
--- /dev/null
+++ b/app/Services/Dealer/OrderService.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Services\Dealer;
+
+use App\Models\DealerProduct;
+use App\Models\User;
+
+class OrderService
+{
+    /**
+     * 计算订单价格
+     *
+     * @param DealerProduct $product
+     * @param integer $number
+     * @return void
+     */
+    public function totalAmount(User $user, DealerProduct $product, int $number = 0)
+    {
+        //获取等级规则，判断当前用户等级是否配置等级价格
+        $salePrice = $product->price;
+        if ($user->dealer) {
+            foreach ($product->lvlRules as $rule) {
+                if ($rule->lvl == $user->dealer->lvl) {
+                    $salePrice = $rule->sale_price;
+                    break;
+                }
+            }
+        }
+
+        //获取销售规则，判断当前用户购买数量价格
+        foreach ($product->saleRules as $rule) {
+            if ($number >= $rule->qty) {
+                if ($salePrice > $rule->price) {
+                    $salePrice = $rule->price;
+                }
+                break;
+            }
+        }
+        // dd($salePrice, $number);
+
+        return bcmul($salePrice, $number, 2);
+    }
+
+    public function createOrder(User $user, DealerProduct $product, int $number = 0)
+    {
+    }
+}