diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 509d47a9..59914f5e 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -590,8 +590,8 @@ class HandoverSerializer(CustomModelSerializer):
         attrs['material'] = wm.material
         attrs['batch'] = wm.batch
         attrs['send_dept'] = wm.belong_dept
-        if attrs['wm'].mgroup:
-            attrs['send_mgroup'] = wm.mgroup
+        if handoverb[0]["wm"].mgroup:
+            attrs['send_mgroup'] = handoverb[0]["wm"].mgroup
         if material.process and material.process.into_wm_mgroup and 'recive_mgroup' not in attrs:
             raise ValidationError('必须指定交接工段')
         if 'recive_mgroup' in attrs and attrs['recive_mgroup']: