diff --git a/app/Controller/Admin/DepotController.php b/app/Controller/Admin/DepotController.php
index 52e5ac8..7e0f843 100644
--- a/app/Controller/Admin/DepotController.php
+++ b/app/Controller/Admin/DepotController.php
@@ -68,7 +68,7 @@ class DepotController
     }
 
     /**
-     * 采购
+     * 采购入库
      * @param DepotRequest $request
      * @return array
      * @throws Exception
@@ -80,6 +80,19 @@ class DepotController
         return (new DepotService)->purchase();
     }
 
+    /**
+     * 采购退货
+     * @param DepotRequest $request
+     * @return array
+     * @throws Exception
+     */
+    #[RequestMapping(path: "depot_purchase_back", methods: "POST")]
+    #[Scene(scene: "purchase_back")]
+    public function purchaseBack(DepotRequest $request): array
+    {
+        return (new DepotService)->purchaseBack();
+    }
+
     /**
      * 采购列表
      * @param DepotRequest $request
diff --git a/app/Model/DepotPurchase.php b/app/Model/DepotPurchase.php
index b823caf..c943923 100644
--- a/app/Model/DepotPurchase.php
+++ b/app/Model/DepotPurchase.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Model;
 
+use Hyperf\Database\Model\Builder;
 use Hyperf\DbConnection\Model\Model;
 
 /**
@@ -14,8 +15,7 @@ use Hyperf\DbConnection\Model\Model;
  * @property int $type 
  * @property string $purchase_price 
  * @property string $number 
- * @property string $sum_price 
- * @property int $status 
+ * @property string $sum_price
  * @property int $city_id 
  * @property int $kitchen_id 
  * @property int $operator_id 
@@ -38,9 +38,14 @@ class DepotPurchase extends Model
     /**
      * The attributes that should be cast to native types.
      */
-    protected array $casts = ['id' => 'integer', 'depot_id' => 'integer', 'material_id' => 'integer', 'supplier_id' => 'integer', 'type' => 'integer', 'status' => 'integer', 'city_id' => 'integer', 'kitchen_id' => 'integer', 'operator_id' => 'integer', 'is_del' => 'integer'];
+    protected array $casts = ['id' => 'integer', 'depot_id' => 'integer', 'material_id' => 'integer', 'supplier_id' => 'integer', 'type' => 'integer', 'city_id' => 'integer', 'kitchen_id' => 'integer', 'operator_id' => 'integer', 'is_del' => 'integer'];
 
     const CREATED_AT = 'create_time';
 
     const UPDATED_AT = 'update_time';
+
+    public function getDepotPurchase(int $id): \Hyperf\Database\Model\Model|Builder|null
+    {
+        return $this->where('id',$id)->first();
+    }
 }
diff --git a/app/Model/MaterialStock.php b/app/Model/MaterialStock.php
index e6a64c5..634d05a 100644
--- a/app/Model/MaterialStock.php
+++ b/app/Model/MaterialStock.php
@@ -36,13 +36,16 @@ class MaterialStock extends Model
      */
     protected array $casts = ['id' => 'integer', 'material_id' => 'integer', 'depot_id' => 'integer', 'supplier_id' => 'integer', 'is_del' => 'integer'];
 
+    const CREATED_AT = 'create_time';
+
+    const UPDATED_AT = 'update_time';
+
     public function getMaterial(int $material_id,int $depot_id,int $supplier_id): \Hyperf\Database\Model\Model|Builder|null
     {
         return $this->where('is_del',MaterialCode::IS_NO_DEL)
             ->where('material_id',$material_id)
             ->where('depot_id',$depot_id)
             ->where('supplier_id',$supplier_id)
-            ->where('is_del',MaterialCode::IS_NO_DEL)
             ->first();
     }
 }
diff --git a/app/Request/Admin/DepotRequest.php b/app/Request/Admin/DepotRequest.php
index 0b59b9b..869188e 100644
--- a/app/Request/Admin/DepotRequest.php
+++ b/app/Request/Admin/DepotRequest.php
@@ -37,7 +37,8 @@ class DepotRequest extends FormRequest
         'depot_add' => ['name','city_id','kitchen_id'],
         'depot_edit' => ['id','name'],
         'depot_delete' => ['id'],
-        'purchase' => ['depot_id','material_id','supplier_id','type','purchase_price','number','city_id','kitchen_id'],
+        'purchase' => ['depot_id','material_id','supplier_id','purchase_price','number','city_id','kitchen_id'],
+        'purchase_back' => ['id','number'],
         'purchase_list' => ['limit','query_id','query_kitchen_id'],
     ];
 }
diff --git a/app/Service/Admin/Depot/DepotService.php b/app/Service/Admin/Depot/DepotService.php
index e68376d..c97a230 100644
--- a/app/Service/Admin/Depot/DepotService.php
+++ b/app/Service/Admin/Depot/DepotService.php
@@ -135,10 +135,11 @@ class DepotService extends BaseService{
         if (empty($materialInfo)) throw new ErrException("材料不存在");
 
         $supplierId = (int)$this->request->input('supplier_id');
-        $supplierInfo = $this->SupplierModel->getInfoById($supplierId);
-        if (empty($supplierInfo)) throw new ErrException('供应商不存在');
+        if (!empty($supplierId)){
+            $supplierInfo = $this->SupplierModel->getInfoById($supplierId);
+            if (empty($supplierInfo)) throw new ErrException('供应商不存在');
+        }
 
-        $type = (int)$this->request->input('type');
         $purchase_price = (double)$this->request->input('purchase_price');
         $number = (double)$this->request->input('number');
 
@@ -153,7 +154,7 @@ class DepotService extends BaseService{
         $depotPurchase->depot_id = $depotId;
         $depotPurchase->material_id = $materialId;
         $depotPurchase->supplier_id = $supplierId;
-        $depotPurchase->type = $type;
+        $depotPurchase->type = 1;
         $depotPurchase->purchase_price = $purchase_price;
         $depotPurchase->number = $number;
         $depotPurchase->sum_price = $sum_price;
@@ -176,14 +177,8 @@ class DepotService extends BaseService{
             $materialStock->unit_price = $purchase_price;
         }
         else{
-            //采购入库
-            if ($depotPurchase->type == 1){
-                $materialStock->current_stock = $materialStock->current_stock + $number;
-            }
-            //采购退货
-            else
-                $materialStock->current_stock = $materialStock->current_stock - $number;
-
+            //库存增加
+            $materialStock->current_stock = $materialStock->current_stock + $number;
         }
 
         if (!$depotPurchase->save() || !$materialStock->save()) throw new ErrException('采购添加失败');
@@ -192,6 +187,51 @@ class DepotService extends BaseService{
 
     }
 
+    public function purchaseBack():array
+    {
+        $id = (int)$this->request->input('id');
+        $number = (double)$this->request->input('number');
+        $info = $this->DepotPurchaseModel->getDepotPurchase($id);
+        if (!empty($info)){
+            $depotPurchase = new DepotPurchase();
+            $depotPurchase->depot_id = $info->depot_id;
+            $depotPurchase->material_id = $info->material_id;
+            $depotPurchase->supplier_id = $info->supplier_id;
+            $depotPurchase->type = 2;
+            $depotPurchase->purchase_price = $info->purchase_price;
+            if (empty($number)){
+                $depotPurchase->number = $info->number;
+            }
+            else{
+                if ($info->number >= $number)
+                    $depotPurchase->number = $number;
+                else
+                    throw new ErrException('采购退货数量不能大于进货数量');
+            }
+
+            $depotPurchase->sum_price = $depotPurchase->purchase_price * $depotPurchase->number;
+            $depotPurchase->city_id = $info->city_id;
+            $depotPurchase->kitchen_id = $info->kitchen_id;
+            $depotPurchase->operator_id = $this->adminId;
+        }
+
+        $materialStock = $this->MaterialStockModel
+            ->where('depot_id',$depotPurchase->depot_id)
+            ->where('material_id',$depotPurchase->material_id)
+            ->where('supplier_id',$depotPurchase->supplier_id)
+            ->first();
+        if (empty($materialStock))
+            throw new ErrException('库存更改异常');
+        else{
+            //库存减少
+            $materialStock->current_stock = $materialStock->current_stock - $depotPurchase->number;
+        }
+
+        if (!$depotPurchase->save() || !$materialStock->save()) throw new ErrException('采购退货失败');
+
+        return $this->return->success();
+    }
+
     public function purchaseList():array
     {
         $limit = (int)$this->request->input('limit', 10);
diff --git a/sync/http/admin/auth.http b/sync/http/admin/auth.http
index 2e22a85..b760d82 100644
--- a/sync/http/admin/auth.http
+++ b/sync/http/admin/auth.http
@@ -382,3 +382,17 @@ GET {{host}}/admin/depot/purchase_list?limit=10
 content-type: application/json
 Authorization: Bearer {{admin_token}}
 
+### 采购入库
+POST {{host}}/admin/depot/depot_purchase
+Content-Type: application/x-www-form-urlencoded
+Authorization: Bearer {{admin_token}}
+
+depot_id=1&material_id=1&supplier_id=1&purchase_price=60&number=2&city_id=1&kitchen_id=1
+
+### 采购退货
+POST {{host}}/admin/depot/depot_purchase_back
+Content-Type: application/x-www-form-urlencoded
+Authorization: Bearer {{admin_token}}
+
+id=6&number=2
+