diff --git a/Readme.md b/Readme.md
index 1b57c19..da65333 100644
--- a/Readme.md
+++ b/Readme.md
@@ -70,19 +70,6 @@ sudo make clean
 sudo make -j12
 ```
 
-* Opetion2 :  
-
-```bash
-sudo apt-get install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev libusb-1.0-0-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev device-tree-compiler pkg-config libexpat-dev libfl-dev
-git clone https://github.com/chipsalliance/rocket-tools.git
-git submodule update --init --recursive
-# riscv-isa-sim and openocd may be checkout to main branch to avoid compile error
-sudo su
-export RISCV=/opt/riscv
-export MAKEFLAGS="-j12"
-./build-rv32ima.sh
-```
-
 ## install xilinx
 
 1. 下载vivado安装文件