diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 8143d366..107d0909 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -1189,14 +1189,15 @@ class HandoverSerializer(CustomModelSerializer):
     def validate(self, attrs):
         if "mtype" not in attrs:
             attrs['mtype'] = Handover.H_NORMAL
-        mtype = attrs["mtype"]
         if 'type' not in attrs:
             attrs['type'] = Handover.H_NORMAL
+
         if attrs["type"] == Handover.H_CHANGE:
+            attrs["mtype"] = Handover.H_MERGE
             if "material_changed" not in attrs:
                 raise ParseError("必须指定改版后的物料")
             
-        if mtype == Handover.H_MERGE:
+        if attrs["mtype"] == Handover.H_MERGE:
             new_state = None
             new_wm:WMaterial = attrs.get("new_wm", None)
             if new_wm:
diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index f6d1a27c..7bb9a5d5 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -720,8 +720,6 @@ def handover_submit(handover:Handover, user: User, now: Union[datetime.datetime,
     recive_mgroup = handover.recive_mgroup
     recive_dept = handover.recive_dept
     
-    if handover.type == Handover.H_CHANGE:
-        handover.mtype = Handover.H_MERGE
     new_batch = handover.new_batch
     if new_batch and mtype != Handover.H_MERGE:
         raise ParseError("只有合并时才能提供新批次号")