diff --git a/modules/story-summary/vector/pipeline/state-integration.js b/modules/story-summary/vector/pipeline/state-integration.js
index 1554efc..26982f0 100644
--- a/modules/story-summary/vector/pipeline/state-integration.js
+++ b/modules/story-summary/vector/pipeline/state-integration.js
@@ -29,7 +29,7 @@ import { filterText } from '../utils/text-filter.js';
 const MODULE_ID = 'state-integration';
 
 // ★ 并发配置
-const CONCURRENCY = 90;
+const CONCURRENCY = 50;
 const STAGGER_DELAY = 15;
 
 let initialized = false;
@@ -159,22 +159,22 @@ export async function incrementalExtractAtoms(chatId, chat, onProgress) {
     const allNewAtoms = [];
 
     // ★ 30 并发批次处理
-    for (let i = 0; i < pendingPairs.length; i += CONCURRENCY) {
-        // ★ 检查取消
-        if (extractionCancelled) {
-            xbLog.info(MODULE_ID, `用户取消，已完成 ${completed}/${total}`);
-            break;
-        }
+        // 并发池处理（保持固定并发度）
+    const poolSize = Math.min(CONCURRENCY, pendingPairs.length);
+    let nextIndex = 0;
+    let started = 0;
+    const runWorker = async () => {
+        while (true) {
+            if (extractionCancelled) return;
+            const idx = nextIndex++;
+            if (idx >= pendingPairs.length) return;
 
-        const batch = pendingPairs.slice(i, i + CONCURRENCY);
-
-        const promises = batch.map((pair, idx) => (async () => {
-            // 首批错开启动，避免瞬间打满
-            if (i === 0) {
-                await new Promise(r => setTimeout(r, idx * STAGGER_DELAY));
+            const pair = pendingPairs[idx];
+            const stagger = started++;
+            if (STAGGER_DELAY > 0) {
+                await new Promise(r => setTimeout(r, stagger * STAGGER_DELAY));
             }
 
-            // 再次检查取消
             if (extractionCancelled) return;
 
             const floor = pair.aiFloor;
@@ -194,7 +194,7 @@ export async function incrementalExtractAtoms(chatId, chat, onProgress) {
                 } else {
                     atoms.forEach(a => a.chatId = chatId);
                     saveStateAtoms(atoms);
-                    // ★ Phase 1: 只收集，不向量化
+                    // Phase 1: 只收集，不向量化
                     allNewAtoms.push(...atoms);
 
                     setL0FloorStatus(floor, { status: 'ok', atoms: atoms.length });
@@ -215,17 +215,11 @@ export async function incrementalExtractAtoms(chatId, chat, onProgress) {
                     onProgress?.(`提取: ${completed}/${total}`, completed, total);
                 }
             }
-        })());
-
-        await Promise.all(promises);
-
-        // 批次间短暂间隔
-        if (i + CONCURRENCY < pendingPairs.length && !extractionCancelled) {
-            await new Promise(r => setTimeout(r, 30));
         }
-    }
+    };
+
+    await Promise.all(Array.from({ length: poolSize }, runWorker));
 
-    // ★ 立即保存文本，不要等防抖
     try {
         saveMetadataDebounced?.();
     } catch { }