diff --git a/app/Http/Controllers/Api/DictItemController.php b/app/Http/Controllers/Api/DictItemController.php
index 67231db..7a6aadc 100644
--- a/app/Http/Controllers/Api/DictItemController.php
+++ b/app/Http/Controllers/Api/DictItemController.php
@@ -37,14 +37,15 @@ class DictItemController extends Controller
             'sort' => ['nullable', 'integer', 'min:0'],
             'is_active' => ['boolean'],
         ]);
-        $row = DictItem::create($data + [
+        // array_merge 后者覆盖前者：显式传 null 时须写成空串，避免 NOT NULL 列报错（不能用 $a+$b，左侧含 null 会保留 null）
+        $row = DictItem::create(array_merge($data, [
             'dict_name' => $data['dict_name'] ?? '',
             'remark' => $data['remark'] ?? '',
             'dict_sort' => $data['dict_sort'] ?? 0,
             'item_remark' => $data['item_remark'] ?? '',
             'sort' => $data['sort'] ?? 0,
             'is_active' => $data['is_active'] ?? true,
-        ]);
+        ]));
         return response()->json($row, 201);
     }