diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index a4293441..f1df4c53 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -274,7 +274,8 @@ class MlogSerializer(CustomModelSerializer):
             if mlogb:
                 Mlogb.objects.filter(mlog=instance).update(count_ok=0)
                 for item in mlogb:
-                    Mlogb.objects.filter(mlog=instance, material_out=item['material_out']).update(count_ok=item['count_ok'])
+                    Mlogb.objects.filter(mlog=instance, material_out=item['material_out']).update(
+                        count_ok=item['count_ok'])
         return instance
 
     def validate(self, attrs):
@@ -284,6 +285,10 @@ class MlogSerializer(CustomModelSerializer):
             if 'count_n_' in i:
                 count_notok = count_notok + attrs[i]
         attrs['count_notok'] = count_notok
+        if attrs['count_real'] >= attrs['count_ok'] + attrs['count_notok']:
+            pass
+        else:
+            raise ValidationError('生产数量不能小于合格数量')
         if mtask:
             if mtask.start_date == mtask.end_date:
                 attrs['handle_date'] = mtask.start_date