diff --git a/server.py b/server.py
index b9addd63..54e9bc6b 100644
--- a/server.py
+++ b/server.py
@@ -535,10 +535,11 @@ def get_tracking():
 
 @app.route("/api/research/strategies")
 def api_research_strategies():
-    """策略版本列表（含回测结果摘要）"""
+    """策略版本列表（含回测结果摘要，支持 period_tag 区间过滤）"""
     try:
         from strategy_lab import list_strategies
-        return jsonify({'strategies': list_strategies()})
+        pt = request.args.get('period_tag')
+        return jsonify({'strategies': list_strategies(period_tag=pt)})
     except Exception as e:
         return jsonify({'error': str(e)}), 500
 
diff --git a/static/index.html b/static/index.html
index 66427c73..7ee52d96 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1931,9 +1931,9 @@ function renderResearch() {
   if (!el) return;
   el.innerHTML = '<div class="flex gap-2 items-center mb-3 flex-wrap">' +
     '<h2 class="text-lg font-bold">📋 策略研究 — 版本迭代对比</h2>' +
-    '<select id="btPeriod" class="bg-slate-800 text-sm rounded-lg px-2 py-1 border border-slate-700">' +
+    '<select id="btPeriod" onchange="loadStrategyList()" 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" selected>近 2 年</option></select>' +
+    '<option value="1y">近 1 年</option><option value="2y" selected>近 2 年</option><option value="5y">近 5 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>' +
@@ -1945,7 +1945,9 @@ function renderResearch() {
 async function loadStrategyList() {
   const listEl = document.getElementById('strategyList');
   try {
-    const resp = await fetch('/api/research/strategies');
+    const ptMap = {'1m':'1m','6m':'6m','1y':'1y','2y':'2y','5y':'5y'};
+    const pt = ptMap[document.getElementById('btPeriod')?.value || '2y'] || '2y';
+    const resp = await fetch('/api/research/strategies?period_tag=' + pt);
     const data = await resp.json();
     if (data.error) { listEl.innerHTML = '<div class="text-red-400">' + data.error + '</div>'; return; }
     const mkt = document.getElementById('btMarket')?.value || 'all';