diff --git a/tools/ci/toolchain.sh b/tools/ci/toolchain.sh
index e744da16d64c..4e44b23d77e7 100755
--- a/tools/ci/toolchain.sh
+++ b/tools/ci/toolchain.sh
@@ -1,6 +1,5 @@
 #!/bin/bash
 
-# 定义工具链下载链接
 declare -A download_urls=(
 ["arm-none-eabi-gcc"]="https://github.com/RT-Thread/toolchains-ci/releases/download/v1.3/gcc-arm-none-eabi-10-2020-q4-major-x86_64-linux.tar.bz2"
 ["mips-sde-elf-gcc"]="https://github.com/RT-Thread/toolchains-ci/releases/download/v1.1/mips-2016.05-7-mips-sde-elf-i686-pc-linux-gnu.tar.bz2"