diff --git a/doc/GRPC_IMPL_CN.md b/doc/GRPC_IMPL_CN.md
index 2091db4ceee81a0f6fa976b6e1de4b5b0540e590..57a92641f9605a998c17eabf7b0d4a79a8573ecf 100644
--- a/doc/GRPC_IMPL_CN.md
+++ b/doc/GRPC_IMPL_CN.md
@@ -92,6 +92,7 @@ python test_server.py uci_housing_model/
 ```shell
 python -m paddle_serving_server.serve --model uci_housing_model --thread 10 --port 9393 --use_multilang
 ```
+注：--use_multilang参数用来启用多语言客户端
 
 ### 客户端预测