diff --git a/backend/routes/sectors.py b/backend/routes/sectors.py
index d5f112b..5e10e76 100644
--- a/backend/routes/sectors.py
+++ b/backend/routes/sectors.py
@@ -1,10 +1,15 @@
 """板块数据路由：行业板块、概念板块"""
 
 from fastapi import APIRouter, Query, HTTPException
+from fastapi.responses import JSONResponse
 from services import eastmoney, mootdx
 
 router = APIRouter()
 
+# 行业/概念通过 query 参数区分，但上游反代/CDN 可能按 path 缓存而忽略 query，
+# 导致两个 tab 返回相同数据。显式禁止缓存，保证按 query 区分。
+_NO_CACHE_HEADERS = {"Cache-Control": "no-store, no-cache, must-revalidate, max-age=0"}
+
 
 @router.get("", summary="板块列表")
 async def sector_list(
@@ -15,11 +20,20 @@ async def sector_list(
 
     data = await eastmoney.fetch_sector_list(type)
     if data:
-        return {"data": data, "count": len(data), "type": type}
+        return JSONResponse(
+            {"data": data, "count": len(data), "type": type},
+            headers=_NO_CACHE_HEADERS,
+        )
 
     # 降级：通达信 mootdx（不含实时资金流数据）
     md_data = await mootdx.fetch_sector_list(type)
     if md_data:
-        return {"data": md_data, "count": len(md_data), "type": type, "source": "mootdx"}
+        return JSONResponse(
+            {"data": md_data, "count": len(md_data), "type": type, "source": "mootdx"},
+            headers=_NO_CACHE_HEADERS,
+        )
 
-    return {"data": [], "count": 0, "type": type}
+    return JSONResponse(
+        {"data": [], "count": 0, "type": type},
+        headers=_NO_CACHE_HEADERS,
+    )
diff --git a/src/lib/stock-api.ts b/src/lib/stock-api.ts
index 52d124f..a334065 100755
--- a/src/lib/stock-api.ts
+++ b/src/lib/stock-api.ts
@@ -468,7 +468,7 @@ export async function fetchSectors(type: SectorType, signal?: AbortSignal): Prom
   const url = `${baseUrl}/api/sectors?type=${type}`;
 
   try {
-    const resp = await fetch(url, { method: "GET", signal });
+    const resp = await fetch(url, { method: "GET", signal, cache: "no-store" });
     if (!resp.ok) return [];
     const result: SectorResponse = await resp.json();
     return result.data || [];