diff --git a/docs/en/docs/Installation/install-DDE.md b/docs/en/docs/Installation/install-DDE.md
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+# DDE installation
+#### Introduction
+
+DDE is a powerful desktop environment developed by UnionTech Team. Contains dozens of powerful desktop applications, which are truly self-developed desktop products.
+
+#### installation method
+
+1. [download](https://openeuler.org/zh/download/) openEuler ISO and install the OS.
+2. update the software source
+```bash
+sudo dnf update
+```
+3. install DDE
+```bash
+sudo dnf install dde
+```
+4. set to start with a graphical interface
+```bash
+sudo systemctl set-default graphical.target
+```
+5. reboot
+```bash
+sudo reboot
+```
+6. After the restart is complete, use the user created during the installation process or the openeuler user to log in to the desktop.
+
+   > dde  cannot log in with root account
+   > dde has built-in openeuler user, the password of this user is openeuler
+
+Now you can use dde.
+
diff --git "a/docs/zh/docs/Installation/\345\256\211\350\243\205DDE.md" "b/docs/zh/docs/Installation/\345\256\211\350\243\205DDE.md"
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+# 在 openEuler 上安装 DDE
+#### 简介
+
+DDE是统信软件团队研发的一款功能强大的桌面环境。包含数十款功能强大的桌面应用，是真正意义上的自主自研桌面产品。
+
+#### 安装方法
+
+1. [下载](https://openeuler.org/zh/download/)openEuler ISO镜像并安装系统
+2. 更新软件源
+```bash
+sudo dnf update
+```
+3. 安装DDE
+```bash
+sudo dnf install dde
+```
+4. 设置以图形界面的方式启动
+```bash
+sudo systemctl set-default graphical.target
+```
+5. 重启
+```bash
+sudo reboot
+```
+6. 在重启完成后，使用安装过程中创建的用户或openeuler用户登陆桌面
+
+   > dde桌面无法使用root账号登陆
+   > dde内置了openeuler用户，此用户的密码为openeuler
+
+现在您可以尽情的使用dde桌面了。
+