diff --git a/developer/getting-start.md b/developer/getting-start.md
index b0a2c0a..31e6510 100644
--- a/developer/getting-start.md
+++ b/developer/getting-start.md
@@ -81,6 +81,14 @@ cd frontend
 yarn install
 ```
 
+如果 Electron 二进制下载缓慢或失败，可以使用 npmmirror 镜像执行一次性安装：
+
+```bash
+yarn cross-env ELECTRON_MIRROR="https://npmmirror.com/mirrors/electron/" yarn install
+```
+
+该命令只为本次 `yarn install` 设置下载源，不会修改全局配置。
+
 
 ### 4. 启动软件
 
@@ -225,6 +233,8 @@ Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
 1. 清理缓存: `yarn cache clean`
 2. 删除 `node_modules` 和 `yarn.lock`
 3. 重新安装: `yarn install`
+4. Electron 二进制下载缓慢或失败时，使用镜像执行一次性安装:
+   `yarn cross-env ELECTRON_MIRROR="https://npmmirror.com/mirrors/electron/" yarn install`
 
 ### Q: 后端启动失败提示权限不足
 
diff --git a/en/developer/getting-start.md b/en/developer/getting-start.md
index 3d64a2a..95e4665 100644
--- a/en/developer/getting-start.md
+++ b/en/developer/getting-start.md
@@ -80,6 +80,14 @@ cd frontend
 yarn install
 ```
 
+If the Electron binary download is slow or fails, use npmmirror for a one-shot install:
+
+```bash
+yarn cross-env ELECTRON_MIRROR="https://npmmirror.com/mirrors/electron/" yarn install
+```
+
+This command sets the download source only for this `yarn install` run and does not change global configuration.
+
 ### 4. Start the App
 
 ::: tip Administrator Privileges
@@ -221,6 +229,8 @@ Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
 1. Clear cache: `yarn cache clean`
 2. Delete `node_modules` and `yarn.lock`
 3. Install again: `yarn install`
+4. If the Electron binary download is slow or fails, install once through the mirror:
+   `yarn cross-env ELECTRON_MIRROR="https://npmmirror.com/mirrors/electron/" yarn install`
 
 ### Q: Backend startup fails due to insufficient permissions