diff --git a/wenet/dataset/dataset.py b/wenet/dataset/dataset.py
index 6bb49c4da..8dbcbb970 100644
--- a/wenet/dataset/dataset.py
+++ b/wenet/dataset/dataset.py
@@ -14,6 +14,7 @@
 # limitations under the License.
 
 from functools import partial
+import sys
 from typing import Optional
 from wenet.dataset import processor
 from wenet.dataset.datapipes import (WenetRawDatasetSource,
@@ -44,7 +45,7 @@ def Dataset(data_type,
     cycle = conf.get('cycle', 1)
     # stage1 shuffle: source
     list_shuffle = conf.get('list_shuffle', True)
-    list_shuffle_size = 10000000
+    list_shuffle_size = sys.maxsize
     if list_shuffle:
         list_shuffle_conf = conf.get('list_shuffle_conf', {})
         list_shuffle_size = list_shuffle_conf.get('shuffle_size',