diff --git a/fastNLP/core/dataloaders/jittor_dataloader/fdl.py b/fastNLP/core/dataloaders/jittor_dataloader/fdl.py
index 3e9cf17a..787fcb69 100644
--- a/fastNLP/core/dataloaders/jittor_dataloader/fdl.py
+++ b/fastNLP/core/dataloaders/jittor_dataloader/fdl.py
@@ -91,6 +91,7 @@ class JittorDataLoader:
             self.dataset.dataset.set_attrs(batch_size=1)
         # 用户提供了 collate_fn，则会自动代替 jittor 提供 collate_batch 函数
         # self._collate_fn = _collate_fn
+        self.cur_batch_indices = None
 
     def __iter__(self):
         # TODO 第一次迭代后不能设置collate_fn，设置是无效的
diff --git a/tests/core/dataloaders/jittor_dataloader/test_fdl.py b/tests/core/dataloaders/jittor_dataloader/test_fdl.py
index 92b49c09..b3124397 100644
--- a/tests/core/dataloaders/jittor_dataloader/test_fdl.py
+++ b/tests/core/dataloaders/jittor_dataloader/test_fdl.py
@@ -42,6 +42,7 @@ class TestJittor:
         jtl = JittorDataLoader(dataset, keep_numpy_array=True, batch_size=4)
         # jtl.set_pad_val('x', 'y')
         # jtl.set_input('x')
+        print(str(jittor.Var([0])))
         for batch in jtl:
             print(batch)
             print(jtl.get_batch_indices())