diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 107c2f76..ad68cd6b 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -394,12 +394,16 @@ class MlogbInSerializer(CustomModelSerializer):
 
     def create(self, validated_data):
         mlog: Mlog = validated_data['mlog']
+        if Mlogb.objects.filter(mlog=mlog, mtask=validated_data['mtask'], wm_in=validated_data['wm_in']).exists():
+            raise ValidationError('该记录已存在')
         if mlog.submit_time is not None:
             raise ParseError('生产日志已提交不可编辑')
         return super().create(validated_data)
     
     def update(self, instance, validated_data):
         mlog: Mlog =  instance.mlog
+        if Mlogb.objects.filter(mlog=mlog, mtask=validated_data['mtask'], wm_in=validated_data['wm_in']).exclude(id=instance.id).exists():
+            raise ValidationError('该记录已存在')
         if mlog.submit_time is not None:
             raise ParseError('生产日志已提交不可编辑')
         return super().update(instance, validated_data)