diff --git a/server/proxy/service/subscription-server-v2.js b/server/proxy/service/subscription-server-v2.js
index 28c04564..8d1eb5fe 100644
--- a/server/proxy/service/subscription-server-v2.js
+++ b/server/proxy/service/subscription-server-v2.js
@@ -152,16 +152,28 @@ function buildStaticNodes() {
 
 // ── 生成subscription-userinfo头 ──────────────
 // 共享流量池模型: total=池配额(2000GB)，upload+download=池总用量
+// 使用缓存的池状态文件(traffic-monitor-v2每5分钟更新)以减少计算开销
 function generateUserInfoHeader(user) {
   const nextMonth = new Date();
   nextMonth.setMonth(nextMonth.getMonth() + 1);
   nextMonth.setDate(1);
   nextMonth.setHours(0, 0, 0, 0);
 
-  // 获取流量池总用量 (所有用户汇总)
-  const poolStatus = userManager.getPoolStatus();
+  // 优先从缓存文件读取池状态 (traffic-monitor-v2每5分钟写入)
+  let poolUpload = 0;
+  let poolDownload = 0;
+  try {
+    const cached = JSON.parse(fs.readFileSync(path.join(DATA_DIR, 'pool-quota-status.json'), 'utf8'));
+    poolUpload = cached.pool_upload_bytes || 0;
+    poolDownload = cached.pool_download_bytes || 0;
+  } catch {
+    // 缓存不可用时实时计算
+    const poolStatus = userManager.getPoolStatus();
+    poolUpload = poolStatus.pool_upload_bytes;
+    poolDownload = poolStatus.pool_download_bytes;
+  }
 
-  return `upload=${poolStatus.pool_upload_bytes}; download=${poolStatus.pool_download_bytes}; total=${userManager.POOL_QUOTA_BYTES}; expire=${Math.floor(nextMonth.getTime() / 1000)}`;
+  return `upload=${poolUpload}; download=${poolDownload}; total=${userManager.POOL_QUOTA_BYTES}; expire=${Math.floor(nextMonth.getTime() / 1000)}`;
 }
 
 // ── 生成VLESS URI (Shadowrocket · 多节点) ─────
diff --git a/server/proxy/service/traffic-monitor-v2.js b/server/proxy/service/traffic-monitor-v2.js
index 2a739497..cbb6f5d9 100644
--- a/server/proxy/service/traffic-monitor-v2.js
+++ b/server/proxy/service/traffic-monitor-v2.js
@@ -101,7 +101,7 @@ function checkPoolAlerts(poolStatus) {
     alertState.alerts_sent = { p80: false, p90: false, p100: false };
   }
 
-  const pct = poolStatus.pool_percentage;
+  const pct = Math.min(poolStatus.pool_percentage, 100);
 
   if (pct >= 100 && !alertState.alerts_sent.p100) {
     console.log(`[V2流量监控] ⚠️ 流量池已用完! ${poolStatus.pool_used_gb.toFixed(2)}GB / ${poolStatus.pool_total_gb}GB`);
diff --git a/server/proxy/service/user-manager.js b/server/proxy/service/user-manager.js
index 6ab49f96..a98ab936 100644
--- a/server/proxy/service/user-manager.js
+++ b/server/proxy/service/user-manager.js
@@ -137,7 +137,7 @@ function addUser(email, options = {}) {
     uuid: generateUUID(),
     token: generateToken(),
     label: options.label || email.split('@')[0],
-    quota_bytes: POOL_QUOTA_BYTES, // 共享流量池配额(展示用·实际按池总量控制)
+    quota_bytes: POOL_QUOTA_BYTES, // 存储池配额引用·实际配额由池级别统一控制(getPoolStatus)·非独立限额
     enabled: true,
     created_at: now.toISOString(),
     traffic: {