diff --git a/token-meter/dashboard.html b/token-meter/dashboard.html
index c1177cc..58f5815 100644
--- a/token-meter/dashboard.html
+++ b/token-meter/dashboard.html
@@ -62,6 +62,15 @@ body.dragging-side .sidebar,body.dragging-side .main{transition:none}
 .ch-main{display:flex;align-items:center;gap:8px;min-width:0}
 .ch-status{width:100%;font-size:.72rem;opacity:.85;margin-top:3px;padding-left:23px}
 .ch-source{width:100%;font-size:.68rem;opacity:.55;margin-top:2px;padding-left:23px;word-break:break-all}
+.ch-bills{width:100%;margin-top:4px;padding-left:23px;font-size:.7rem}
+.ch-bills-head{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-bottom:2px}
+.bill-title{opacity:.6}
+.bill-sync-btn{font-size:.66rem;padding:1px 8px;border:1px solid var(--border);background:transparent;color:var(--text);border-radius:6px;cursor:pointer;opacity:.85}
+.bill-sync-btn:hover{background:var(--hover)}
+.bill-sync-btn:disabled{opacity:.45;cursor:wait}
+.bill-row{display:flex;justify-content:space-between;align-items:center;padding:1px 0;opacity:.75;font-family:Consolas,monospace}
+.bill-total{border-top:1px dashed rgba(255,255,255,.14);margin-top:2px;padding-top:2px;opacity:.95;font-weight:600}
+.bill-empty{opacity:.5;padding:2px 0}
 .status-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0;background:#95a5a6}
 .status-dot.ok{background:#2ecc71;box-shadow:0 0 6px #2ecc71}
 .status-dot.warn{background:#f39c12}
@@ -548,6 +557,30 @@ function manualUpdateChannel(id){
       }catch(_){/* 刷新失败不打断 toast */}
     });
 }
+/* ── 历史账单：手动从平台同步（按月），仅账单调口渠道（阿里云百炼）展示 ── */
+function billBlockHtml(ch){
+  const bills=ch.bills||[];
+  if(!(ch.platform==='阿里云百炼'&&ch.billing_model==='balance')) return '';
+  const rows=bills.map(b=>`<div class="bill-row"><span>${b.month}</span><span>¥${fmtMoney(b.total)}</span></div>`).join('');
+  const total=bills.reduce((s,b)=>s+Number(b.total),0);
+  const list=bills.length?rows+`<div class="bill-row bill-total"><span>合计</span><span>¥${fmtMoney(total)}</span></div>`:'<div class="bill-empty">未同步 · 点上方按钮拉取平台账单</div>';
+  return `<div class="ch-bills"><div class="ch-bills-head"><span class="bill-title">历史账单</span><button class="bill-sync-btn" id="billSyncBtn${ch.id}" onclick="syncBills(${ch.id})">⟳ 同步历史账单</button></div>${list}</div>`;
+}
+async function syncBills(id){
+  const btn=document.getElementById('billSyncBtn'+id);
+  if(btn){btn.disabled=true;btn.textContent='同步中…';}
+  try{
+    const res=await fetch(`${API_BASE}/api/channels/${id}/sync-bills`,{method:'POST'});
+    const data=await res.json().catch(()=>({}));
+    if(!res.ok) throw new Error(data.message||'同步失败');
+    await loadChannels();
+    renderSidebar();
+    showToast(`历史账单同步完成：${data.synced} 个月，合计 ¥${fmtMoney(data.total)}`);
+  }catch(e){
+    showToast(e.message,true);
+    if(btn){btn.disabled=false;btn.textContent='⟳ 同步历史账单';}
+  }
+}
 function renderSidebar(){
   const list=document.getElementById('channelList');
   list.innerHTML='';
@@ -556,7 +589,7 @@ function renderSidebar(){
     div.className='ch-item';
     div.title=ch.billing_model==='balance'?'点击此渠道立即手动采集一次（10 秒冷却）':'点击测试连接（订阅制数据由采集脚本推送）';
     const checked=selectedChannels.has(ch.id)?'checked':'';
-    div.innerHTML=`<div class="ch-main"><input type="checkbox" ${checked} onchange="toggleChannel(${ch.id})"><span>${esc(ch.name)}</span><span class="ch-tag">${esc(ch.platform||'')}</span>${ch.billing_model==='balance'?'<span class="ch-tag mode-tag tag-balance">按量</span>':'<span class="ch-tag mode-tag tag-used">订阅</span>'}<span class="status-dot" id="chDot${ch.id}"></span></div><div class="ch-status" id="chStat${ch.id}"></div><div class="ch-source" id="chSrc${ch.id}"></div><button class="ch-more" onclick="toggleChannelMenu(${ch.id},event)" title="更多操作">⋮</button><div class="ch-menu" id="chMenu${ch.id}"><button onclick="openEditChannel(${ch.id},event)">✎ 修改</button><button class="danger" onclick="removeChannel(${ch.id},event)">🗑 删除</button></div>`;
+    div.innerHTML=`<div class="ch-main"><input type="checkbox" ${checked} onchange="toggleChannel(${ch.id})"><span>${esc(ch.name)}</span><span class="ch-tag">${esc(ch.platform||'')}</span>${ch.billing_model==='balance'?'<span class="ch-tag mode-tag tag-balance">按量</span>':'<span class="ch-tag mode-tag tag-used">订阅</span>'}<span class="status-dot" id="chDot${ch.id}"></span></div><div class="ch-status" id="chStat${ch.id}"></div><div class="ch-source" id="chSrc${ch.id}"></div>${billBlockHtml(ch)}<button class="ch-more" onclick="toggleChannelMenu(${ch.id},event)" title="更多操作">⋮</button><div class="ch-menu" id="chMenu${ch.id}"><button onclick="openEditChannel(${ch.id},event)">✎ 修改</button><button class="danger" onclick="removeChannel(${ch.id},event)">🗑 删除</button></div>`;
     // 点击条目主体（排除 checkbox、⋮ 按钮与弹出菜单）触发手动采集
     div.onclick=(ev)=>{
       if(ev.target.closest('input,button,.ch-menu')) return;
diff --git a/token-meter/server.js b/token-meter/server.js
index ed08120..407b31b 100644
--- a/token-meter/server.js
+++ b/token-meter/server.js
@@ -268,6 +268,17 @@ async function ensureSchema() {
         ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
     `);
 
+    // ── 历史账单表（手动同步的月度账单，供仪表盘按月回看真实费用）──
+    await pool.query(`
+        CREATE TABLE IF NOT EXISTS \`channel_bill_history\` (
+            \`channel_id\` INT NOT NULL,
+            \`month\` VARCHAR(7) NOT NULL,
+            \`total\` DECIMAL(24,10) NOT NULL DEFAULT 0,
+            \`synced_at\` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+            PRIMARY KEY (\`channel_id\`, \`month\`)
+        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
+    `);
+
     // ── 确保 ai_usage_points 有 channel_id 列 ──
     const [cols] = await pool.query(
         "SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = ? AND TABLE_NAME = 'ai_usage_points' AND COLUMN_NAME = 'channel_id'",
@@ -553,6 +564,16 @@ async function handleGetChannels(response) {
     const usageMap = {};
     for (const u of usageRows) usageMap[u.channel_id] = Number(u.total_usage) || 0;
 
+    // ── 批量查询各渠道的历史月度账单（手动同步）──
+    const [billRows] = await pool.query(
+        'SELECT `channel_id`, `month`, `total` FROM `channel_bill_history` ORDER BY `month` ASC'
+    );
+    const billMap = {};
+    for (const b of billRows) {
+        if (!billMap[b.channel_id]) billMap[b.channel_id] = [];
+        billMap[b.channel_id].push({ month: b.month, total: Number(b.total) });
+    }
+
     return sendJson(response, 200, {
         channels: rows.map(r => ({
             id: r.id,
@@ -566,7 +587,8 @@ async function handleGetChannels(response) {
             spend_alert_threshold: r.spend_alert_threshold == null ? null : Number(r.spend_alert_threshold),
             enabled: !!r.enabled,
             created_at: r.created_at,
-            total_usage: usageMap[r.id] || 0
+            total_usage: usageMap[r.id] || 0,
+            bills: billMap[r.id] || []
         }))
     });
 }
@@ -763,9 +785,33 @@ async function fetchAlibabaBillTotal(accessKeyId, accessKeySecret, billingCycle)
     return total;
 }
 
-/** 百炼渠道每日账单校准：逐月累计「自监控起点」以来的真实消费，与余额差已用对比。
- * 偏差（如停机期间充值+消费同时发生、自动识别漏掉的注资）> 0 时补记到 topups；
- * 偏差 ≤ 0 一律忽略（当月账单未完整出账等都会让账单偏小，向下修正会污染已用曲线）。 */
+/** 手动同步历史账单：从当前月往前逐月查询 BSS 月度账单，写入 channel_bill_history 供仪表盘按月回看。
+ * 连续 2 个空月视为更早无账单即停止，最多回溯 36 个月；与每日校准（费用对账）相互独立。 */
+async function syncBillHistoryForChannel(channel) {
+    const { accessKeyId, accessKeySecret } = alibabaAccessKeyOf(channel);
+    const synced = [];
+    let emptyStreak = 0;
+    const now = new Date();
+    for (let i = 0; i < 36; i++) {
+        const cursor = new Date(now.getFullYear(), now.getMonth() - i, 1);
+        const month = `${cursor.getFullYear()}-${String(cursor.getMonth() + 1).padStart(2, '0')}`;
+        const total = await fetchAlibabaBillTotal(accessKeyId, accessKeySecret, month);
+        if (total > 0.005) {
+            await pool.query(
+                'INSERT INTO `channel_bill_history` (`channel_id`, `month`, `total`) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE `total` = VALUES(`total`)',
+                [channel.id, month, total]
+            );
+            synced.push({ month, total: +total.toFixed(6) });
+            emptyStreak = 0;
+        } else {
+            emptyStreak += 1;
+            if (emptyStreak >= 2) break;
+        }
+        await new Promise(resolve => setTimeout(resolve, 250)); // 限速避免接口限流
+    }
+    return synced;
+}
+
 async function calibrateAlibabaChannels() {
     const [rows] = await pool.query(
         'SELECT `id`, `name`, `api_key`, `baseline_balance`, `topups` FROM `channels` WHERE `platform` = ? AND `enabled` = 1',
@@ -1219,6 +1265,27 @@ async function collectAllChannels() {
     }
 }
 
+// ── 手动同步历史账单：仅提供账单接口的渠道（阿里云百炼）可用，30 秒冷却防连点 ──
+const lastSyncBillsAt = new Map();
+async function handleSyncBills(response, idStr) {
+    const id = Number(idStr);
+    if (!id) throw new ApiError(400, '无效的渠道 ID。');
+    const [rows] = await pool.query('SELECT `id`, `name`, `platform`, `api_key` FROM `channels` WHERE `id` = ?', [id]);
+    if (!rows.length) throw new ApiError(404, '渠道未找到。');
+    const channel = rows[0];
+    if (channel.platform !== '阿里云百炼' || !channel.api_key) {
+        throw new ApiError(400, '该渠道不支持同步历史账单（需要阿里云百炼的 AccessKey）。');
+    }
+    const waitMs = 30000 - (Date.now() - (lastSyncBillsAt.get(id) || 0));
+    if (waitMs > 0) throw new ApiError(429, `同步过于频繁，请 ${Math.ceil(waitMs / 1000)} 秒后再试。`);
+    lastSyncBillsAt.set(id, Date.now());
+    log(`[历史账单] 渠道「${channel.name}」开始同步历史账单…`);
+    const synced = await syncBillHistoryForChannel(channel);
+    const total = synced.reduce((sum, m) => sum + m.total, 0);
+    log(`[历史账单] 渠道「${channel.name}」同步完成：${synced.length} 个月（合计 ¥${total.toFixed(2)}）`);
+    return sendJson(response, 200, { ok: true, synced: synced.length, months: synced, total: +total.toFixed(6) });
+}
+
 // ── 手动更新渠道：点击渠道条目时立即采集一次（10 秒冷却），落库按手动时间差决策 ──
 async function handleManualCollect(response, idStr) {
     const id = Number(idStr);
@@ -1328,6 +1395,8 @@ async function handleDeleteChannel(response, idStr) {
         await connection.beginTransaction();
         // 级联清理该渠道的历史用量数据，避免留下孤儿数据点
         await connection.query('DELETE FROM `ai_usage_points` WHERE `channel_id` = ?', [id]);
+        // 级联清理该渠道的历史账单记录
+        await connection.query('DELETE FROM `channel_bill_history` WHERE `channel_id` = ?', [id]);
         const [result] = await connection.query('DELETE FROM `channels` WHERE `id` = ?', [id]);
         if (!result.affectedRows) throw new ApiError(404, '渠道未找到。');
         await connection.commit();
@@ -1548,6 +1617,10 @@ async function handleRequest(request, response) {
     if (request.method === 'POST' && channelCollectMatch) {
         return handleManualCollect(response, channelCollectMatch[1]);
     }
+    const channelSyncBillsMatch = url.pathname.match(/^\/api\/channels\/(\d+)\/sync-bills$/);
+    if (request.method === 'POST' && channelSyncBillsMatch) {
+        return handleSyncBills(response, channelSyncBillsMatch[1]);
+    }
 
     // ── 用量查询 API ──
     if (request.method === 'GET' && url.pathname === '/api/usage') {