diff --git a/demo/seqToseq/api_train_v2.py b/demo/seqToseq/api_train_v2.py
index bdcf3a5af074d2c91f121be2610d63ba9c5009e8..74ae1cf9ec81b00b55202d7c1316c7cb074cfd43 100644
--- a/demo/seqToseq/api_train_v2.py
+++ b/demo/seqToseq/api_train_v2.py
@@ -93,12 +93,12 @@ def main():
     trn_reader = paddle.reader.batched(
         paddle.reader.shuffle(
             train_reader("data/pre-wmt14/train/train"), buf_size=8192),
-        batch_size=10000)
+        batch_size=5)
 
     trainer.train(
         reader=trn_reader,
         event_handler=event_handler,
-        num_passes=10,
+        num_passes=10000,
         reader_dict=reader_dict)