diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 6a7f95e2..2ac94141 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -286,6 +286,9 @@ class MlogSerializer(CustomModelSerializer):
 
     def create(self, validated_data):
         material_out = validated_data['material_out']
+        mtask:Mtask = validated_data.get('mtask', None)
+        if mtask and mtask.state != Mtask.MTASK_ASSGINED:
+            raise ParseError('该任务非下达中不可选择')
         with transaction.atomic():
             mlogb = validated_data.pop('mlogb', [])
             instance: Mlog = super().create(validated_data)