diff --git a/app/db.py b/app/db.py
index 2b7a24f..5f23f9b 100644
--- a/app/db.py
+++ b/app/db.py
@@ -141,7 +141,8 @@ def list_machines(conn: sqlite3.Connection) -> list[dict]:
     return [row_to_dict(r) for r in cur.fetchall()]
 
 
-ONLINE_SECONDS = 180  # 与下载中心一致：3 分钟内心跳视为在线
+# 客户端约 2 秒心跳一次；超过该秒数无心跳视为离线（秒级大屏）
+ONLINE_SECONDS = 8
 
 
 def list_machines_for_user(conn: sqlite3.Connection, user: dict) -> list[dict]:
diff --git a/app/routes.py b/app/routes.py
index 37047a9..34cfab1 100644
--- a/app/routes.py
+++ b/app/routes.py
@@ -3,11 +3,13 @@ from __future__ import annotations
 
 import json
 import secrets
+import time
 from datetime import datetime
 from functools import wraps
 
 from flask import (
     Flask,
+    Response,
     flash,
     g,
     jsonify,
@@ -16,6 +18,7 @@ from flask import (
     request,
     send_from_directory,
     session,
+    stream_with_context,
     url_for,
 )
 
@@ -222,42 +225,69 @@ def register_routes(app: Flask) -> None:
         data = _dashboard_payload(current_user())
         return render_template("dashboard.html", **data)
 
+    def _dashboard_live_dict(u: dict) -> dict:
+        data = _dashboard_payload(u)
+        return {
+            "ok": True,
+            "ts": database.now(),
+            "online_count": data["online_count"],
+            "machine_count": data["machine_count"],
+            "online_machines": [
+                {
+                    "id": m["id"],
+                    "name": m.get("name") or f"#{m['id']}",
+                    "last_seen_at": m.get("last_seen_at"),
+                    "last_seen_fmt": _fmt_ts(m.get("last_seen_at")),
+                    "online": True,
+                }
+                for m in data["online_machines"]
+            ],
+            "trades": [
+                {
+                    "id": t["id"],
+                    "time_fmt": t.get("time_fmt"),
+                    "symbol": t.get("symbol"),
+                    "side": t.get("side"),
+                    "volume": t.get("volume"),
+                    "profit": t.get("profit"),
+                    "account_name": t.get("account_name"),
+                    "machine_name": t.get("machine_name"),
+                    "ticket": t.get("ticket"),
+                }
+                for t in data["trades"]
+            ],
+        }
+
     @app.get("/api/dashboard/live")
     @login_required
     def dashboard_live():
-        """总览轮询：在线机器 + 实时成交。"""
-        data = _dashboard_payload(current_user())
-        return jsonify(
-            {
-                "ok": True,
-                "online_count": data["online_count"],
-                "machine_count": data["machine_count"],
-                "online_machines": [
-                    {
-                        "id": m["id"],
-                        "name": m.get("name") or f"#{m['id']}",
-                        "last_seen_at": m.get("last_seen_at"),
-                        "last_seen_fmt": _fmt_ts(m.get("last_seen_at")),
-                        "online": True,
-                    }
-                    for m in data["online_machines"]
-                ],
-                "trades": [
-                    {
-                        "id": t["id"],
-                        "time_fmt": t.get("time_fmt"),
-                        "symbol": t.get("symbol"),
-                        "side": t.get("side"),
-                        "volume": t.get("volume"),
-                        "profit": t.get("profit"),
-                        "account_name": t.get("account_name"),
-                        "machine_name": t.get("machine_name"),
-                        "ticket": t.get("ticket"),
-                    }
-                    for t in data["trades"]
-                ],
-            }
-        )
+        """总览快照（兼容轮询）。"""
+        return jsonify(_dashboard_live_dict(current_user()))
+
+    @app.get("/api/dashboard/stream")
+    @login_required
+    def dashboard_stream():
+        """秒级 SSE 推送：在线机器 + 实时成交。"""
+        u = current_user()
+
+        @stream_with_context
+        def event_stream():
+            # 立即推一帧，后续约每秒一帧
+            while True:
+                try:
+                    payload = json.dumps(_dashboard_live_dict(u), ensure_ascii=False)
+                    yield f"data: {payload}\n\n"
+                except GeneratorExit:
+                    return
+                except Exception:
+                    yield 'event: error\ndata: {"ok":false}\n\n'
+                time.sleep(1)
+
+        resp = Response(event_stream(), mimetype="text/event-stream")
+        resp.headers["Cache-Control"] = "no-cache"
+        resp.headers["X-Accel-Buffering"] = "no"
+        resp.headers["Connection"] = "keep-alive"
+        return resp
 
     # ---------- 账户（仅管理员创建）----------
     @app.get("/accounts")
@@ -404,7 +434,7 @@ def register_routes(app: Flask) -> None:
                 ).fetchall()
             activations = []
             now_ts = database.now()
-            online_sec = 180  # 3 分钟内有心跳视为在线
+            online_sec = database.ONLINE_SECONDS
             for r in acts:
                 item = database.row_to_dict(r)
                 last = item.get("machine_last_seen")
diff --git a/app/templates/dashboard.html b/app/templates/dashboard.html
index c510d45..6babdb9 100644
--- a/app/templates/dashboard.html
+++ b/app/templates/dashboard.html
@@ -1,7 +1,7 @@
 {% extends "base.html" %}
 {% block title %}总览 · {{ app_name }}{% endblock %}
 {% block content %}
-<h2 style="margin:0 0 14px">总览</h2>
+<h2 style="margin:0 0 14px">总览 <span class="muted" style="font-size:13px;font-weight:400" id="live-hint">· 秒级推送</span></h2>
 <div class="grid cols-3">
   <div class="card"><div class="muted">账户</div><div class="stat">{{ accounts|length }}</div></div>
   <div class="card">
@@ -13,7 +13,7 @@
 
 <div class="grid cols-2" style="margin-top:14px">
   <div class="card">
-    <h3>在线机器 <span class="muted" style="font-weight:400;font-size:12px">· 约 5 秒刷新</span></h3>
+    <h3>在线机器</h3>
     <table>
       <thead><tr><th>机器</th><th>状态</th><th>最近心跳</th></tr></thead>
       <tbody id="online-machines-body">
@@ -24,7 +24,7 @@
           <td class="muted">{{ m.last_seen_fmt }}</td>
         </tr>
         {% else %}
-        <tr><td colspan="3" class="muted">当前无在线机器（客户端运行中会每分钟心跳）</td></tr>
+        <tr><td colspan="3" class="muted">当前无在线机器（客户端约每 2 秒心跳）</td></tr>
         {% endfor %}
       </tbody>
     </table>
@@ -41,7 +41,7 @@
 </div>
 
 <div class="card" style="margin-top:14px">
-  <h3>机器实时交易记录 <span class="muted" style="font-weight:400;font-size:12px">· 自动刷新</span></h3>
+  <h3>机器实时交易记录</h3>
   <table>
     <thead>
       <tr>
@@ -74,8 +74,10 @@
 {% block scripts %}
 <script>
 (function () {
+  var streamUrl = {{ url_for('dashboard_stream')|tojson }};
   var liveUrl = {{ url_for('dashboard_live')|tojson }};
   var detailBase = {{ url_for('record_detail', tid=0)|tojson }}.replace(/0$/, '');
+  var hint = document.getElementById('live-hint');
 
   function esc(s) {
     return String(s == null ? '' : s)
@@ -87,7 +89,7 @@
     var body = document.getElementById('online-machines-body');
     if (!body) return;
     if (!list.length) {
-      body.innerHTML = '<tr><td colspan="3" class="muted">当前无在线机器（客户端运行中会每分钟心跳）</td></tr>';
+      body.innerHTML = '<tr><td colspan="3" class="muted">当前无在线机器（客户端约每 2 秒心跳）</td></tr>';
       return;
     }
     body.innerHTML = list.map(function (m) {
@@ -129,19 +131,36 @@
     }).join('');
   }
 
-  function tick() {
-    fetch(liveUrl, { credentials: 'same-origin' })
-      .then(function (r) { return r.json(); })
-      .then(function (data) {
-        if (!data || !data.ok) return;
-        document.getElementById('stat-online').textContent = String(data.online_count);
-        renderMachines(data.online_machines || []);
-        renderTrades(data.trades || []);
-      })
-      .catch(function () {});
+  function apply(data) {
+    if (!data || !data.ok) return;
+    document.getElementById('stat-online').textContent = String(data.online_count);
+    renderMachines(data.online_machines || []);
+    renderTrades(data.trades || []);
   }
 
-  setInterval(tick, 5000);
+  function startPollFallback() {
+    if (hint) hint.textContent = '· 轮询 1s（SSE 不可用）';
+    setInterval(function () {
+      fetch(liveUrl, { credentials: 'same-origin' })
+        .then(function (r) { return r.json(); })
+        .then(apply)
+        .catch(function () {});
+    }, 1000);
+  }
+
+  if (typeof EventSource === 'undefined') {
+    startPollFallback();
+    return;
+  }
+
+  var es = new EventSource(streamUrl);
+  es.onmessage = function (ev) {
+    try { apply(JSON.parse(ev.data)); } catch (e) {}
+  };
+  es.onerror = function () {
+    es.close();
+    startPollFallback();
+  };
 })();
 </script>
 {% endblock %}
diff --git a/deploy/ecosystem.config.cjs b/deploy/ecosystem.config.cjs
index 34ae51d..2ce305d 100644
--- a/deploy/ecosystem.config.cjs
+++ b/deploy/ecosystem.config.cjs
@@ -11,7 +11,8 @@ module.exports = {
       name: "gold_monitor",
       cwd: root,
       script: path.join(root, ".venv/bin/gunicorn"),
-      args: "wsgi:app --bind 0.0.0.0:5800 --workers 2 --threads 4 --timeout 120",
+      // threads 便于 SSE 长连接；timeout 拉长避免秒级推送被 worker 杀掉
+      args: "wsgi:app --bind 0.0.0.0:5800 --workers 2 --threads 8 --timeout 300 --keep-alive 5",
       interpreter: "none",
       autorestart: true,
       max_restarts: 20,
diff --git a/desktop/README.md b/desktop/README.md
index e4fcee1..1caf0f0 100644
--- a/desktop/README.md
+++ b/desktop/README.md
@@ -5,7 +5,7 @@
 - 连接本机已登录 MT5，市价开平、ATR 止损止盈、保本、满仓灰显等（由原 `MT5黄金方案/Desktop` 迁入）
 - **通用包 + 首次激活**：仅第一次填写中控地址与激活码；**不允许离线运行**
 - **打开复盘**：用已保存的中控地址打开 `/login`
-- **心跳**：运行中每分钟 ping 中控，网页下载中心显示在线/离线
+- **心跳**：约每 2 秒 ping 中控，配合总览 SSE 秒级在线状态
 - **自动上报**：开仓/平仓成功后上报成交与四周期 K 线
 
 ## 本地配置
diff --git a/desktop/gold_order_app.py b/desktop/gold_order_app.py
index 2390587..5c03a08 100644
--- a/desktop/gold_order_app.py
+++ b/desktop/gold_order_app.py
@@ -1447,23 +1447,22 @@ class OrderApp(tk.Tk):
         self._run_async(work)
 
     def _hub_heartbeat(self) -> None:
-        """定期 ping 中控，供网页显示在线；断线则提示（不允许离线运行）。"""
+        """约每 2 秒 ping 中控，供总览秒级在线状态。"""
+        interval_ms = 2000
         if hub_client is None or not is_activated():
-            self.after(60000, self._hub_heartbeat)
+            self.after(interval_ms, self._hub_heartbeat)
             return
 
         def work():
-            ok = False
             try:
-                ok = bool(hub_client.ping())
+                return bool(hub_client.ping())
             except Exception:
-                ok = False
-            return ok
+                return False
 
         def done(ok: bool):
             if not ok:
                 self.set_status("中控离线：请检查服务器，客户端需保持在线", ok=False)
-            self.after(60000, self._hub_heartbeat)
+            self.after(interval_ms, self._hub_heartbeat)
 
         def run():
             ok = work()
diff --git a/docs/technical.md b/docs/technical.md
index 04d1fba..bb9d644 100644
--- a/docs/technical.md
+++ b/docs/technical.md
@@ -3,11 +3,13 @@
 ## 1. 架构
 
 ```
-Browser (复盘/管理) ──HTTP:5800──► Flask(gunicorn) + SQLite
+Browser (复盘大屏) ──SSE/HTTP:5800──► Flask(gunicorn threads) + SQLite
                                          ▲
-Windows exe (通用包+激活) ──API───────────┘
+Windows exe (心跳约2s + 成交上报) ───────┘
          │
          └── MetaTrader5 (本机)
+
+总览秒级：`GET /api/dashboard/stream`（SSE，约 1 秒一帧）；在线判定约 8 秒无心跳为离线。
 ```
 
 - **不直连数据库**：多机只走 HTTP API。  
diff --git a/releases/黄金市价辅助.exe b/releases/黄金市价辅助.exe
index 0e0615f..1480fa8 100644
Binary files a/releases/黄金市价辅助.exe and b/releases/黄金市价辅助.exe differ