diff --git a/hb_server/apps/mtm/views.py b/hb_server/apps/mtm/views.py
index d218d7b..d9c9eaf 100644
--- a/hb_server/apps/mtm/views.py
+++ b/hb_server/apps/mtm/views.py
@@ -53,13 +53,13 @@ class ProcessViewSet(PageOrNot, CreateUpdateModelAMixin, ModelViewSet):
     ordering_fields = ['number']
     ordering = ['number']
 
-    @action(methods=['get'], detail=True, perms_map={'get':'process_update'}, pagination_class=None, serializer_class=StepSerializer)
+    @action(methods=['get'], detail=True, perms_map={'get':'process_update'}, pagination_class=None, serializer_class=StepDetailSerializer)
     def steps(self, request, pk=None):
         """
         工序下的子工序
         """
         process = self.get_object()
-        serializer = self.serializer_class(instance=Step.objects.filter(process=process, is_deleted=False), many=True)
+        serializer = self.serializer_class(instance=Step.objects.prefetch_related('equipments').filter(process=process, is_deleted=False), many=True)
         return Response(serializer.data)
 
 class StepViewSet(OptimizationMixin, CreateUpdateModelAMixin, CreateModelMixin, UpdateModelMixin, RetrieveModelMixin, DestroyModelMixin, GenericViewSet):
@@ -74,7 +74,9 @@ class StepViewSet(OptimizationMixin, CreateUpdateModelAMixin, CreateModelMixin,
     ordering = ['sort']
 
     def get_serializer_class(self):
-        return StepDetailSerializer
+        if self.action == 'retrieve':
+            return StepDetailSerializer
+        return StepSerializer
 
 # class ProductProcessViewSet(PageOrNot, CreateModelMixin, UpdateModelMixin, ListModelMixin, DestroyModelMixin, GenericViewSet):
 #     """