diff --git a/apps/mtm/views.py b/apps/mtm/views.py
index 5f3d4788..9bb00e4c 100644
--- a/apps/mtm/views.py
+++ b/apps/mtm/views.py
@@ -362,13 +362,29 @@ class RoutePackViewSet(CustomModelViewSet):
     @action(methods=['get'], detail=True, perms_map={'get': '*'})
     def final_materials(self, request, *args, **kwargs):
         """获取最终产品
-        
+
         获取最终产品"""
         ins:RoutePack = self.get_object()
         matIds = ins.get_final_material_ids()
         qs = Material.objects.filter(id__in=matIds)
         res = [{"id": x.id, "name": str(x)} for x in qs]
         return Response(res)
+
+    @action(methods=['get'], detail=True, perms_map={'get': '*'})
+    def validate(self, request, *args, **kwargs):
+        """校验工艺图是否合法(不存盘)
+
+        供拖拽画布实时校验DAG结构,返回 {valid, error},不修改gjson
+        """
+        ins:RoutePack = self.get_object()
+        try:
+            ins.validate_and_return_gjson()
+            return Response({"valid": True, "error": ""})
+        except ParseError as e:
+            detail = e.detail
+            if isinstance(detail, (list, tuple)):
+                detail = detail[0] if detail else ""
+            return Response({"valid": False, "error": str(detail)})
 class RouteViewSet(CustomModelViewSet):
     queryset = Route.objects.all()
     serializer_class = RouteSerializer