diff --git a/app/admin/controller/Store.php b/app/admin/controller/Store.php
index 8d681534..735df4e1 100644
--- a/app/admin/controller/Store.php
+++ b/app/admin/controller/Store.php
@@ -184,18 +184,38 @@ class Store extends Controller
      */
     public function auth(int $storeId): Json
     {
-        SyncTask::where('store_id', $storeId)->delete();
         $platformList = $this->request->param('platformList');
+        $currItems = SyncTask::where('store_id', $storeId)->select()->toArray();
+        if ($currItems) {
+            $delIds = [];
+            foreach ($currItems as $item) {
+                if (!in_array($item['channel'], $platformList)) {
+                    $delIds[] = $item['id'];
+                }
+            }
+            unset($item);
+            //删除
+            if ($delIds) {
+                SyncTask::whereIn('id', $delIds)->delete();
+            }
+        }
+        $curr_channels = array_column($currItems, "channel");
         $inData = [];
-        foreach ($platformList as $value) {
+        foreach ($platformList as $platform) {
+            if (in_array($platform, $curr_channels)) {
+                continue;
+            }
             $inData[] = [
                 'store_id' => $storeId,
-                'channel' => $value,
+                'channel' => $platform,
                 'create_time' => time(),
             ];
         }
-        $model = new SyncTask;
-        $model->addAll($inData);
+        if ($inData) {
+            $model = new SyncTask;
+            $model->addAll($inData);
+            
+        }
         
         return $this->renderSuccess('操作成功');
     }