diff --git a/examples/trans/README.md b/examples/trans/README.md
index 43066fab2..101c9ab3b 100644
--- a/examples/trans/README.md
+++ b/examples/trans/README.md
@@ -46,7 +46,12 @@ optional arguments:
   --n_layers         int        transformer model n_layers              default 6
 ```
 
-run the example
+**run the example**
+
+step 1: Download the dataset to the cmn-eng directory.
+
+step 2: Run the following script.
+
 ```
-python train.py --dataset cmn-2000.txt --max-epoch 100 --batch-size 32 --lr 0.01
+python train.py --dataset cmn-eng/cmn-2000.txt --max-epoch 100 --batch-size 32 --lr 0.01
 ```
diff --git a/examples/trans/data.py b/examples/trans/data.py
index 8be5157ed..1087bed7a 100644
--- a/examples/trans/data.py
+++ b/examples/trans/data.py
@@ -56,12 +56,12 @@ def __len__(self):
 
 
 class CmnDataset:
-    def __init__(self, path='cmn-eng/cmn.txt', shuffle=False, batch_size=32, train_ratio=0.8, random_seed=0):
+    def __init__(self, path, shuffle=False, batch_size=32, train_ratio=0.8, random_seed=0):
         """
         cmn dataset, download from https://www.manythings.org/anki/, contains 29909 Chinese and English translation
         pairs, the pair format: English + TAB + Chinese + TAB + Attribution
         Args:
-            path: the path of the dataset, default 'cmn-eng/cnn.txt'
+            path: the path of the dataset
             shuffle: shuffle the dataset, default False
             batch_size: the size of every batch, default 32
             train_ratio: the proportion of the training set to the total data set, default 0.8
diff --git a/examples/trans/run.sh b/examples/trans/run.sh
index 3e7e11bc0..b73559f39 100644
--- a/examples/trans/run.sh
+++ b/examples/trans/run.sh
@@ -18,4 +18,4 @@
 #
 
 # run this example
-python train.py --dataset cmn-2000.txt --max-epoch 300 --batch-size 32 --lr 0.01
\ No newline at end of file
+python train.py --dataset cmn-eng/cmn-2000.txt --max-epoch 100 --batch-size 32 --lr 0.01
\ No newline at end of file
diff --git a/examples/trans/train.py b/examples/trans/train.py
index 995312033..906ff0916 100644
--- a/examples/trans/train.py
+++ b/examples/trans/train.py
@@ -35,7 +35,7 @@ def run(args):
     np.random.seed(args.seed)
 
     batch_size = args.batch_size
-    cmn_dataset = CmnDataset(path="cmn-eng/"+args.dataset, shuffle=args.shuffle, batch_size=batch_size, train_ratio=0.8)
+    cmn_dataset = CmnDataset(path=args.dataset, shuffle=args.shuffle, batch_size=batch_size, train_ratio=0.8)
 
     print("【step-0】 prepare dataset...")
     src_vocab_size, tgt_vocab_size = cmn_dataset.en_vab_size, cmn_dataset.cn_vab_size
@@ -151,8 +151,7 @@ def run(args):
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description="Training Transformer Model.")
-    parser.add_argument('--dataset', choices=['cmn.txt', 'cmn-15000.txt',
-                                              'cmn-2000.txt'],  default='cmn-2000.txt')
+    parser.add_argument('--dataset', default='cmn-eng/cmn-2000.txt')
     parser.add_argument('--max-epoch', default=100, type=int, help='maximum epochs.', dest='max_epoch')
     parser.add_argument('--batch-size', default=64, type=int, help='batch size', dest='batch_size')
     parser.add_argument('--shuffle', default=True, type=bool, help='shuffle the dataset', dest='shuffle')