diff --git a/app/settings/update/page.tsx b/app/settings/update/page.tsx
index 2c2ec29..aeacf97 100644
--- a/app/settings/update/page.tsx
+++ b/app/settings/update/page.tsx
@@ -42,6 +42,12 @@ export default function UpdatePage() {
     logEndRef.current?.scrollIntoView({behavior: "smooth"});
   }, [logs]);
 
+  // 页面加载时自动检查更新
+  useEffect(() => {
+    handleCheckUpdate();
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
   // 检查更新
   const handleCheckUpdate = useCallback(async () => {
     setCheckState("checking");
diff --git a/lib/update.ts b/lib/update.ts
index 86217ee..b18f6a8 100644
--- a/lib/update.ts
+++ b/lib/update.ts
@@ -1,6 +1,6 @@
 import fs from "fs";
 import path from "path";
-import { execSync } from "child_process";
+import { spawn } from "child_process";
 
 // ============================================================
 // 版本更新模块
@@ -57,38 +57,78 @@ function consoleErr(tag: string, msg: string): void {
 }
 
 /**
- * 执行命令并记录到控制台
+ * 异步执行命令，实时流式输出（不阻塞事件循环）
+ * @param command 可执行文件
+ * @param args 参数列表
+ * @param tag 日志标签
+ * @param options.onLine 每行输出回调（用于 SSE 推送到前端）
  */
-function execSyncAndLog(
+function execAsync(
   command: string,
+  args: string[],
   tag: string,
-  options: Parameters<typeof execSync>[1] & { encoding?: "utf-8" } = {}
-): string {
-  consoleLog(tag, `执行: ${command}`);
-  try {
-    const stdout = execSync(command, {
-      encoding: "utf-8",
-      windowsHide: true,
-      ...options,
-    });
-    const out = stdout?.trim();
-    if (out) {
-      const lines = out.split("\n").filter(Boolean);
-      // 最多打印 5 行，避免刷屏
-      lines.slice(0, 5).forEach((l) => consoleLog(tag, `  │ ${l}`));
-      if (lines.length > 5) consoleLog(tag, `  │ ... 共 ${lines.length} 行`);
-    }
-    consoleLog(tag, "✓ 完成");
-    return stdout || "";
-  } catch (err) {
-    const e = err as Error & { stderr?: Buffer };
-    const stderr = e.stderr?.toString().trim();
-    if (stderr) {
-      stderr.split("\n").filter(Boolean).forEach((l) => consoleErr(tag, `  │ ${l}`));
-    }
-    consoleErr(tag, `失败: ${e.message}`);
-    throw err;
+  options?: {
+    timeout?: number;
+    cwd?: string;
+    onLine?: (line: string) => void;
   }
+): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const desc = `${command} ${args.join(" ")}`;
+    consoleLog(tag, `执行: ${desc}`);
+
+    const child = spawn(command, args, {
+      cwd: options?.cwd,
+      timeout: options?.timeout,
+      stdio: ["ignore", "pipe", "pipe"],
+      windowsHide: true,
+    });
+
+    let timedOut = false;
+    if (options?.timeout) {
+      const timer = setTimeout(() => {
+        timedOut = true;
+        child.kill();
+        reject(new Error(`命令超时 (${options.timeout}ms): ${desc}`));
+      }, options.timeout);
+      child.on("close", () => clearTimeout(timer));
+    }
+
+    const handleData = (data: Buffer, isStderr: boolean) => {
+      const str = data.toString();
+      const lines = str.split("\n").filter(Boolean);
+      for (const raw of lines) {
+        const line = raw.trimEnd();
+        if (!line) continue;
+        if (isStderr) {
+          consoleErr(tag, `  │ ${line.slice(0, 2000)}`);
+        } else {
+          consoleLog(tag, `  │ ${line.slice(0, 2000)}`);
+        }
+        options?.onLine?.(line);
+      }
+    };
+
+    child.stdout?.on("data", (data: Buffer) => handleData(data, false));
+    child.stderr?.on("data", (data: Buffer) => handleData(data, true));
+
+    child.on("close", (code) => {
+      if (timedOut) return;
+      if (code === 0) {
+        consoleLog(tag, `✓ 完成`);
+        resolve();
+      } else {
+        consoleErr(tag, `失败 (exit=${code})`);
+        reject(new Error(`Command failed with exit code ${code}: ${desc}`));
+      }
+    });
+
+    child.on("error", (err) => {
+      if (timedOut) return;
+      consoleErr(tag, `异常: ${err.message}`);
+      reject(err);
+    });
+  });
 }
 
 /**
@@ -130,19 +170,15 @@ function getAuthenticatedRemoteUrl(): string {
 /**
  * 通过 git ls-remote 获取远程最新 commit hash
  */
-export function getRemoteCommitHash(): string | null {
+export async function getRemoteCommitHash(): Promise<string | null> {
   try {
     const url = getAuthenticatedRemoteUrl();
-    const output = execSync(`git ls-remote "${url}" HEAD`, {
-      encoding: "utf-8",
+    let stdout = "";
+    await execAsync("git", ["ls-remote", url, "HEAD"], "git-ls-remote", {
       timeout: 15000,
-      env: {
-        ...process.env,
-        GIT_TERMINAL_PROMPT: "0",
-      },
-      windowsHide: true,
+      onLine: (line) => { stdout += line + "\n"; },
     });
-    const match = output.match(/^([a-f0-9]+)\s+HEAD/m);
+    const match = stdout.match(/^([a-f0-9]+)\s+HEAD/m);
     return match?.[1] || null;
   } catch {
     return null;
@@ -152,19 +188,16 @@ export function getRemoteCommitHash(): string | null {
 /**
  * 获取远程 .version 文件内容并解析为 VersionFile
  */
-export function getRemoteVersionFile(): VersionFile | null {
+export async function getRemoteVersionFile(): Promise<VersionFile | null> {
   // 尝试方式1: git archive
   try {
     const url = getAuthenticatedRemoteUrl();
-    const output = execSync(
-      `git archive --remote="${url}" HEAD:.version 2>nul`,
-      {
-        encoding: "utf-8",
-        timeout: 15000,
-        windowsHide: true,
-      }
-    );
-    const parsed = JSON.parse(output.trim()) as VersionFile;
+    let stdout = "";
+    await execAsync("git", ["archive", `--remote=${url}`, "HEAD:.version"], "git-archive", {
+      timeout: 15000,
+      onLine: (line) => { stdout += line; },
+    });
+    const parsed = JSON.parse(stdout.trim()) as VersionFile;
     if (parsed.version) return parsed;
   } catch {
     // fall through
@@ -178,18 +211,15 @@ export function getRemoteVersionFile(): VersionFile | null {
  * 通过浅克隆获取远程 .version 文件（备选方案）
  * OneDev 不支持 git archive --remote，改用完整浅克隆
  */
-function getRemoteVersionByClone(): VersionFile | null {
+async function getRemoteVersionByClone(): Promise<VersionFile | null> {
   const tmpDir = path.join(
     process.env.TEMP || "/tmp",
     `recipe_tool_version_${Date.now()}`
   );
   try {
     const url = getAuthenticatedRemoteUrl();
-    execSync(`git clone --depth 1 "${url}" "${tmpDir}"`, {
-      encoding: "utf-8",
+    await execAsync("git", ["clone", "--depth", "1", url, tmpDir], "git-clone", {
       timeout: 60000,
-      windowsHide: true,
-      stdio: ["ignore", "pipe", "pipe"],
     });
     const versionPath = path.join(tmpDir, ".version");
     if (fs.existsSync(versionPath)) {
@@ -234,7 +264,7 @@ export async function checkForUpdate(): Promise<VersionInfo> {
   const current = readLocalVersionFile();
   consoleLog("检查", `当前版本: v${current.version} (${current.release_date || "无日期"})`);
 
-  const remoteCommit = getRemoteCommitHash();
+  const remoteCommit = await getRemoteCommitHash();
 
   if (!remoteCommit) {
     consoleErr("检查", "无法连接到远程仓库");
@@ -247,7 +277,7 @@ export async function checkForUpdate(): Promise<VersionInfo> {
   }
 
   consoleLog("检查", `远程 HEAD: ${remoteCommit}`);
-  const remoteVersionFile = getRemoteVersionFile();
+  const remoteVersionFile = await getRemoteVersionFile();
 
   if (remoteVersionFile) {
     const cmp = compareVersions(remoteVersionFile.version, current.version);
@@ -279,10 +309,10 @@ export async function checkForUpdate(): Promise<VersionInfo> {
 /**
  * 检查 Docker 是否可用
  */
-function checkDockerAvailable(): { ok: boolean; message: string } {
+async function checkDockerAvailable(): Promise<{ ok: boolean; message: string }> {
   consoleLog("Docker", "检查 Docker 守护进程...");
   try {
-    execSyncAndLog("docker info", "Docker");
+    await execAsync("docker", ["info"], "Docker");
     consoleLog("Docker", "✓ Docker 正常");
     return { ok: true, message: "" };
   } catch {
@@ -314,13 +344,16 @@ export async function executeUpdate(
   consoleLog("执行", "=== 开始执行更新 ===");
   consoleLog("执行", `临时目录: ${tmpDir}`);
 
+  // 包装 onLog，将输出行实时推送到 SSE
+  const logLine = (line: string) => onLog(line);
+
   try {
     onLog("开始更新流程");
 
     // 0. 检查 Docker 是否可用
     onLog("[0/5] 检查 Docker 环境");
     consoleLog("执行", "步骤 0/5 — 检查 Docker 环境");
-    const dockerCheck = checkDockerAvailable();
+    const dockerCheck = await checkDockerAvailable();
     if (!dockerCheck.ok) {
       onLog(`✗ ${dockerCheck.message}`);
       consoleErr("执行", "Docker 检查未通过，更新终止");
@@ -332,11 +365,10 @@ export async function executeUpdate(
     const url = getAuthenticatedRemoteUrl();
     onLog("[1/5] 克隆最新代码");
     consoleLog("执行", "步骤 1/5 — 克隆代码");
-    execSyncAndLog(
-      `git clone --depth 1 "${url}" "${tmpDir}"`,
-      "git-clone",
-      { timeout: 120000, stdio: ["ignore", "pipe", "pipe"] }
-    );
+    await execAsync("git", ["clone", "--depth", "1", url, tmpDir], "git-clone", {
+      timeout: 120000,
+      onLine: logLine,
+    });
     onLog("✓ 代码拉取完成");
 
     // 2. 生成 .env 文件
@@ -357,26 +389,25 @@ export async function executeUpdate(
     consoleLog("执行", `.env 已写入 ${envContent.split("\n").length} 行`);
     onLog("✓ 环境变量已准备");
 
-    // 3. 构建新镜像
+    // 3. 构建新镜像（实时输出构建日志）
     onLog("[3/5] 构建新 Docker 镜像");
     consoleLog("执行", "步骤 3/5 — 构建镜像（可能耗时较长）");
-    execSyncAndLog(
-      `cd "${tmpDir}" && docker-compose -p recipe_tool build`,
-      "docker-build",
-      { timeout: 600000, stdio: ["ignore", "pipe", "pipe"] }
-    );
+    await execAsync("docker-compose", ["-p", "recipe_tool", "build"], "docker-build", {
+      cwd: tmpDir,
+      timeout: 600000,
+      onLine: logLine,
+    });
     onLog("✓ 镜像构建完成");
 
-    // 4. 停止旧容器（释放端口）
+    // 4. 停止旧容器（释放端口），忽略失败
     onLog("[4/5] 停止旧容器");
     consoleLog("执行", "步骤 4/5 — 停止旧容器");
-    // 忽略 down 的错误（首次运行可能没有旧容器）
     try {
-      execSyncAndLog(
-        `cd "${tmpDir}" && docker-compose -p recipe_tool down`,
-        "docker-down",
-        { timeout: 30000, stdio: ["ignore", "pipe", "pipe"] }
-      );
+      await execAsync("docker-compose", ["-p", "recipe_tool", "down", "--remove-orphans"], "docker-down", {
+        cwd: tmpDir,
+        timeout: 30000,
+        onLine: logLine,
+      });
     } catch {
       consoleLog("执行", "旧容器停止（可能不存在，忽略）");
     }
@@ -385,11 +416,11 @@ export async function executeUpdate(
     // 5. 启动新容器
     onLog("[5/5] 启动新容器");
     consoleLog("执行", "步骤 5/5 — 启动新容器");
-    execSyncAndLog(
-      `cd "${tmpDir}" && docker-compose -p recipe_tool up -d`,
-      "docker-up",
-      { timeout: 60000, stdio: ["ignore", "pipe", "pipe"] }
-    );
+    await execAsync("docker-compose", ["-p", "recipe_tool", "up", "-d"], "docker-up", {
+      cwd: tmpDir,
+      timeout: 60000,
+      onLine: logLine,
+    });
     onLog("✓ 新容器已启动");
 
     consoleLog("执行", "=== 更新成功 ===");