diff --git a/fastNLP/core/controllers/utils/utils.py b/fastNLP/core/controllers/utils/utils.py
index 0a351354..b01cccc4 100644
--- a/fastNLP/core/controllers/utils/utils.py
+++ b/fastNLP/core/controllers/utils/utils.py
@@ -132,6 +132,10 @@ class _TruncatedDataLoader:
     def __getattr__(self, item):
         return getattr(self.dataloader, item)
 
+    def __setattr__(self, key, value):
+        # 添加该函数使得在进行实验性训练或者评测时，用户对于 trainer.dataloader 的感觉和正常训练完全一样；
+        setattr(self.dataloader, key, value)
+
 
 def check_evaluate_every(evaluate_every):
     r"""