diff --git a/PaddleNLP/language_representations_kit/ELMo/run.sh b/PaddleNLP/language_representations_kit/ELMo/run.sh
index b83c34fa3e55fc9c8ef2340df5ea7c06ad45a088..a14235135097061929417ad1a2548033541e46e7 100755
--- a/PaddleNLP/language_representations_kit/ELMo/run.sh
+++ b/PaddleNLP/language_representations_kit/ELMo/run.sh
@@ -1,4 +1,7 @@
+#if use gpu， you could specify gpu devices
 export CUDA_VISIBLE_DEVICES=0 
+#if use cpu, you could specify cpu nums
+export CPU_NUM=10
 python  train.py \
 --train_path='data/train/sentence_file_*'  \
 --test_path='data/dev/sentence_file_*'  \