diff --git a/app/components/TransactionHistoryModal.jsx b/app/components/TransactionHistoryModal.jsx
index 0da767b..5e06b31 100644
--- a/app/components/TransactionHistoryModal.jsx
+++ b/app/components/TransactionHistoryModal.jsx
@@ -78,7 +78,7 @@ export default function TransactionHistoryModal({
             onClick={onAddHistory}
             style={{ fontSize: '12px', padding: '4px 12px', height: 'auto' }}
           >
-            ➕ 添加记录
+            添加记录
           </button>
         </div>
 
diff --git a/app/lib/tradingCalendar.js b/app/lib/tradingCalendar.js
new file mode 100644
index 0000000..4e5f741
--- /dev/null
+++ b/app/lib/tradingCalendar.js
@@ -0,0 +1,56 @@
+/**
+ * A股交易日历：基于 chinese-days 节假日数据，严格判断某日期是否为交易日
+ * 交易日 = 周一至周五 且 不在法定节假日
+ * 调休补班日（周末变工作日）A股仍休市，故不视为交易日
+ */
+
+const CDN_BASE = 'https://cdn.jsdelivr.net/npm/chinese-days@1/dist/years';
+const yearCache = new Map(); // year -> Set<dateStr> (holidays)
+
+/**
+ * 加载某年的节假日数据
+ * @param {number} year
+ * @returns {Promise<Set<string>>} 节假日日期集合，格式 YYYY-MM-DD
+ */
+export async function loadHolidaysForYear(year) {
+  if (yearCache.has(year)) {
+    return yearCache.get(year);
+  }
+  try {
+    const res = await fetch(`${CDN_BASE}/${year}.json`);
+    if (!res.ok) throw new Error(`HTTP ${res.status}`);
+    const data = await res.json();
+    const holidays = new Set(Object.keys(data?.holidays ?? {}));
+    yearCache.set(year, holidays);
+    return holidays;
+  } catch (e) {
+    console.warn(`[tradingCalendar] 加载 ${year} 年节假日失败:`, e);
+    yearCache.set(year, new Set());
+    return yearCache.get(year);
+  }
+}
+
+/**
+ * 加载多个年份的节假日数据
+ * @param {number[]} years
+ */
+export async function loadHolidaysForYears(years) {
+  await Promise.all([...new Set(years)].map(loadHolidaysForYear));
+}
+
+/**
+ * 判断某日期是否为 A股交易日
+ * @param {dayjs.Dayjs} date - dayjs 对象
+ * @param {Map<number, Set<string>>} [cache] - 可选，已加载的年份缓存，默认使用内部 yearCache
+ * @returns {boolean}
+ */
+export function isTradingDay(date, cache = yearCache) {
+  const dayOfWeek = date.day(); // 0=周日, 6=周六
+  if (dayOfWeek === 0 || dayOfWeek === 6) return false;
+
+  const dateStr = date.format('YYYY-MM-DD');
+  const year = date.year();
+  const holidays = cache.get(year);
+  if (!holidays) return true; // 未加载该年数据时，仅排除周末
+  return !holidays.has(dateStr);
+}
diff --git a/app/page.jsx b/app/page.jsx
index 48cb15e..522276a 100644
--- a/app/page.jsx
+++ b/app/page.jsx
@@ -43,6 +43,7 @@ import DcaModal from "./components/DcaModal";
 import githubImg from "./assets/github.svg";
 import { supabase, isSupabaseConfigured } from './lib/supabase';
 import { recordValuation, getAllValuationSeries, clearFund } from './lib/valuationTimeseries';
+import { loadHolidaysForYears, isTradingDay as isDateTradingDay } from './lib/tradingCalendar';
 import { fetchFundData, fetchLatestRelease, fetchShanghaiIndexDate, fetchSmartFundNetValue, searchFunds, extractFundNamesWithLLM } from './api/fund';
 import packageJson from '../package.json';
 import PcFundTable from './components/PcFundTable';
@@ -1635,7 +1636,7 @@ export default function HomePage() {
     });
   };
 
-  const scheduleDcaTrades = useCallback(() => {
+  const scheduleDcaTrades = useCallback(async () => {
     if (!isTradingDay) return;
     if (!isPlainObject(dcaPlans)) return;
     const codesSet = new Set(funds.map((f) => f.code));
@@ -1645,6 +1646,14 @@ export default function HomePage() {
     const nextPlans = { ...dcaPlans };
     const newPending = [];
 
+    // 预加载回溯区间内所有年份的节假日数据
+    const years = new Set([today.year()]);
+    Object.values(dcaPlans).forEach((plan) => {
+      if (plan?.firstDate) years.add(toTz(plan.firstDate).year());
+      if (plan?.lastDate) years.add(toTz(plan.lastDate).year());
+    });
+    await loadHolidaysForYears([...years]);
+
     Object.entries(dcaPlans).forEach(([code, plan]) => {
       if (!plan || !plan.enabled) return;
       if (!codesSet.has(code)) return;
@@ -1680,12 +1689,10 @@ export default function HomePage() {
         if (current.isAfter(today, 'day')) break;
         if (current.isBefore(first, 'day')) continue;
 
+        // 回溯补单：严格判断该日是否为 A股交易日（排除周末、法定节假日）
+        if (!isDateTradingDay(current)) continue;
+
         const dateStr = current.format('YYYY-MM-DD');
-        // 每日定投：跳过周末（周六、周日），只生成交易日
-        if (cycle === 'daily') {
-          const dayOfWeek = current.day(); // 0=周日, 6=周六
-          if (dayOfWeek === 0 || dayOfWeek === 6) continue;
-        }
 
         const pending = {
           id: `dca_${code}_${dateStr}_${Date.now()}`,
@@ -1736,7 +1743,9 @@ export default function HomePage() {
 
   useEffect(() => {
     if (!isTradingDay) return;
-    scheduleDcaTrades();
+    scheduleDcaTrades().catch((e) => {
+      console.error('[scheduleDcaTrades]', e);
+    });
   }, [isTradingDay, scheduleDcaTrades]);
 
   const handleAddGroup = (name) => {