diff --git a/apps/mtm/views.py b/apps/mtm/views.py
index c3d7eb18..61b05a92 100644
--- a/apps/mtm/views.py
+++ b/apps/mtm/views.py
@@ -77,6 +77,12 @@ class MgroupViewSet(CustomModelViewSet):
     search_fields = ['name']
     ordering = ['sort', 'create_time']
 
+    def perform_destroy(self, instance):
+        Route.objects.filter(
+            mgroup=instance, material__need_route=False).delete()
+        Route.objects.filter(mgroup=instance).update(mgroup=None)
+        instance.delete()
+
 
 class TeamViewSet(CustomModelViewSet):
     """