diff --git a/bin/clawd.js b/bin/clawd.js
index 559193a..d07bd3e 100755
--- a/bin/clawd.js
+++ b/bin/clawd.js
@@ -5,12 +5,23 @@
 require('../lib/systemd-env');
 
 const path = require('path');
+const fs = require("fs");
 const { exec } = require('child_process');
 const { ClawClient } = require('../lib/client');
 const config = require('../lib/config');
 const log = require('../lib/logger');
 const { pollSms } = require('../drivers/sim/sms-reader');
 
+// 每次启动同步 3588s demo 到 /usr/bin/demo（idempotent，失败不影响主流程）
+const demoBin = path.join(__dirname, "..", "lib/resource/3588s/demo");
+const demoDst = "/usr/bin/demo";
+if (fs.existsSync(demoBin)) {
+  exec(`install -m 0755 "${demoBin}" "${demoDst}"`, (err) => {
+    if (err) log.warn("clawd", `demo sync failed: ${err.message}`);
+    else     log.info("clawd", "demo synced to /usr/bin/demo");
+  });
+}
+
 // 每次启动绑定 Quectel 串口驱动（失败不影响主流程）
 const bindScript = path.join(__dirname, '..', 'tools', 'bind-quectel-serial.sh');
 exec(`bash "${bindScript}"`, (err, stdout, stderr) => {