diff --git a/apps/enm/serializers.py b/apps/enm/serializers.py
index 1bcfa42e..d9ac1818 100644
--- a/apps/enm/serializers.py
+++ b/apps/enm/serializers.py
@@ -29,11 +29,12 @@ class MpointSerializer(CustomModelSerializer):
         ratio_ = 0
         mgroupIds = []
         for i in attrs['mgroups_allocate']:
-            ratio_ = ratio_ + i['ratio']
-            if i['mgroup'] in mgroupIds:
-                raise ParseError('分配集错误')
-            mgroupIds.append(i['mgroup'])
-            i['mgroup_name'] = Mgroup.objects.get(id=i['mgroup']).name
+            if i['mgroup']:
+                ratio_ = ratio_ + i['ratio']
+                if i['mgroup'] in mgroupIds:
+                    raise ParseError('分配集错误')
+                mgroupIds.append(i['mgroup'])
+                i['mgroup_name'] = Mgroup.objects.get(id=i['mgroup']).name
         if attrs['mgroups_allocate'] and round(ratio_, 3) != 1.0:
             raise ParseError('比例合计错误')
         return attrs