diff --git a/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md b/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
index b4de073aa..eb5debdde 100644
--- a/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
@@ -71,7 +71,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 ```shell
 $ tar -xjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/kd233/README.md b/Ubiquitous/XiZi_IIoT/board/kd233/README.md
index 4b86c7e56..cc6bfb67e 100644
--- a/Ubiquitous/XiZi_IIoT/board/kd233/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/kd233/README.md
@@ -67,7 +67,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 ```shell
 $ tar -xjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/rv32m1-vega/README.md b/Ubiquitous/XiZi_IIoT/board/rv32m1-vega/README.md
index 04f1dd8c8..889b3ef43 100755
--- a/Ubiquitous/XiZi_IIoT/board/rv32m1-vega/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/rv32m1-vega/README.md
@@ -68,7 +68,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载并解压。[下载网址 https://open-isa.org/downloads/]
 ![gnu](img/riscv_gnu.png)