diff --git a/backend/services/eastmoney.py b/backend/services/eastmoney.py
index e75aa6e..c6a7c1e 100644
--- a/backend/services/eastmoney.py
+++ b/backend/services/eastmoney.py
@@ -366,9 +366,7 @@ async def fetch_sector_list(sector_type: str) -> list[dict]:
     data = await _fetch_akshare(sector_type)
     if data:
         _sector_cache[sector_type] = (data, now)
-        ttl = _sector_ttl_hours()
-        if ttl > 0:
-            set_cache(cache_key, json.dumps(data, ensure_ascii=False), ttl_hours=ttl)
+        # akshare 数据源更新不确定，不写入磁盘缓存
     return data