diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 80b514f7..8cb642ec 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -356,6 +356,8 @@ class MlogSerializer(CustomModelSerializer):
             wm_in = instance.wm_in
             if wm_in:
                 batch_in = wm_in.batch
+                instance.batch = batch_in
+                instance.save(update_fields=['batch'])
             mlogbin = None
             if instance.material_in: # 如果有消耗
                 add_dict = {