diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index b36bb633..43aeec8b 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -436,6 +436,8 @@ class MlogbInSerializer(CustomModelSerializer):
     def validate(self, attrs):
         mlog: Mlog = attrs['mlog']
         mtask: Mtask = attrs['mtask']
+        if mtask.submit_time is not None:
+            raise ValidationError('不可选择已提交的任务')
         wm_in: WMaterial = attrs['wm_in']
         if wm_in.state != WMaterial.WM_OK:
             raise ValidationError('非合格品不可使用')