diff --git a/egs/wenetspeech/ASR/prepare.sh b/egs/wenetspeech/ASR/prepare.sh
index e50166a12..e3e28bd24 100755
--- a/egs/wenetspeech/ASR/prepare.sh
+++ b/egs/wenetspeech/ASR/prepare.sh
@@ -11,7 +11,7 @@ stop_stage=100
 
 # Split L subset to this number of pieces
 # This is to avoid OOM during feature extraction.
-num_splits=100
+num_splits=1000
 
 # We assume dl_dir (download dir) contains the following
 # directories and files. If not, they will be downloaded