比如安装在 D:\Program Files\Appium，cmd 执行
"D:\Program Files\Appium\node.exe" "D:\Program Files\Appium\node_modules\appium\bin\appium.js"
启动成功

info: Welcome to Appium v1.3.4 (REV c8c79a85fbd6870cd6fc3d66d038a115ebe22efe)
info: Appium REST http interface listener started on 0.0.0.0:4723
info: Console LogLevel: debug

加上参数
"D:\Program Files\Appium\node.exe" "D:\Program Files\Appium\node_modules\appium\bin\appium.js" -p 4724
参数生效

info: Welcome to Appium v1.3.4 (REV c8c79a85fbd6870cd6fc3d66d038a115ebe22efe)
info: Appium REST http interface listener started on 0.0.0.0:4724
info: [debug] Non-default server args: {"port":4724}
info: Console LogLevel: debug

在 D:\Program Files\Appium\写好的批处理 appium.cmd，内容是

@IF EXIST "%~dp0\node.exe" (
  "%~dp0\node.exe"  "%~dp0\node_modules\appium\bin\appium.js" %*
) ELSE (
  @SETLOCAL
  @SET PATHEXT=%PATHEXT:;.JS;=;%
  node  "%~dp0\node_modules\appium\bin\appium.js" %*
)

然后把路径添加到环境变量 Path 中，cmd 执行
appium.cmd
启动成功

info: Welcome to Appium v1.3.4 (REV c8c79a85fbd6870cd6fc3d66d038a115ebe22efe)
info: Appium REST http interface listener started on 0.0.0.0:4723
info: Console LogLevel: debug