diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index d5997d15..5ad0373a 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -680,7 +680,7 @@ class MlogbInSerializer(CustomModelSerializer):
                         'wm_in': {'required': True, "allow_empty": False}}
     
     def validate(self, attrs):
-        if attrs["count_use"] < 0 or attrs["count_pn_jgqbl"] < 0 or attrs["count_break"] < 0:
+        if attrs["count_use"] < 0 or attrs.get("count_pn_jgqbl", 0) < 0 or attrs["count_break"] < 0:
             raise ParseError('存在负数!')
         mlog:Mlog = attrs['mlog']
         is_fix = mlog.is_fix
@@ -747,7 +747,7 @@ class MlogbInUpdateSerializer(CustomModelSerializer):
         fields = ['id', 'count_use', 'count_pn_jgqbl', 'note', 'mlogbdefect']
 
     def validate(self, attrs):
-        if attrs["count_use"] < 0 or attrs["count_pn_jgqbl"] < 0:
+        if attrs["count_use"] < 0 or attrs.get("count_pn_jgqbl", 0) < 0:
             raise ParseError('存在负数!')
         return attrs
     def update(self, instance, validated_data):