diff --git a/server.py b/server.py
index b706aaae..b37724af 100644
--- a/server.py
+++ b/server.py
@@ -556,7 +556,7 @@ def api_research_backtest():
     market = request.args.get('market', 'all')  # all | a | hk
     capital = float(request.args.get('capital', 1000000))
     end_date = '2026-07-24'  # 数据完整截止日
-    days = {'1m': 30, '6m': 185, '1y': 365, '2y': 730}.get(period, 185)
+    days = {'1m': 30, '6m': 185, '1y': 365, '2y': 730, '5y': 1825, '10y': 3650}.get(period, 185)
     start_date = (datetime.strptime(end_date, '%Y-%m-%d') - timedelta(days=days)).strftime('%Y-%m-%d')
     try:
         from strategy_lab import run_backtest, analyze_trade_list, save_analysis
diff --git a/static/index.html b/static/index.html
index 5dc25c13..6968e98f 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1934,7 +1934,7 @@ function renderResearch() {
     '<h2 class="text-lg font-bold">📋 策略研究 — 版本迭代对比</h2>' +
     '<select id="btPeriod" onchange="saveBtPeriod()" class="bg-slate-800 text-sm rounded-lg px-2 py-1 border border-slate-700">' +
     '<option value="1m">近 1 个月</option><option value="6m">近 6 个月</option>' +
-    '<option value="1y">近 1 年</option><option value="2y">近 2 年</option><option value="5y">近 5 年</option></select>' +
+    '<option value="1y">近 1 年</option><option value="2y">近 2 年</option><option value="5y">近 5 年</option><option value="10y">近 10 年</option></select>' +
     '<select id="btMarket" class="bg-slate-800 text-sm rounded-lg px-2 py-1 border border-slate-700" onchange="loadStrategyList()">' +
     '<option value="all">全部市场</option><option value="a">A股</option><option value="hk">港股</option></select>' +
     '<span class="text-xs text-slate-500">每版策略基于上一版归因分析迭代 · 点击行展开明细</span></div>' +
@@ -1956,7 +1956,7 @@ function saveBtPeriod() {
 async function loadStrategyList() {
   const listEl = document.getElementById('strategyList');
   try {
-    const ptMap = {'1m':'1m','6m':'6m','1y':'1y','2y':'2y','5y':'5y'};
+    const ptMap = {'1m':'1m','6m':'6m','1y':'1y','2y':'2y','5y':'5y','10y':'10y'};
     const pt = ptMap[window._btPeriodVal || document.getElementById('btPeriod')?.value || '2y'] || '2y';
     const resp = await fetch('/api/research/strategies?period_tag=' + pt);
     const data = await resp.json();