diff --git a/backend/server.js b/backend/server.js
index a99c6c0..ca54bd6 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -1790,9 +1790,15 @@ async function runDownloadTrafficLogReconcile(trigger = 'interval') {
         const processed = DownloadTrafficIngestDB.isProcessed(ingestConfig.bucket, key, etag);
         if (processed) continue;
 
-        // 仅处理常见日志文件后缀
+        // 兼容无后缀日志（阿里云 OSS 默认日志文件通常没有 .log 后缀）
+        if (key.endsWith('/')) {
+          continue;
+        }
         const lowerKey = key.toLowerCase();
-        if (!lowerKey.endsWith('.log') && !lowerKey.endsWith('.txt') && !lowerKey.endsWith('.gz')) {
+        const hasKnownLogExt = lowerKey.endsWith('.log') || lowerKey.endsWith('.txt') || lowerKey.endsWith('.gz');
+        const hasLogLikeToken = lowerKey.includes('traffic') || lowerKey.includes('access') || lowerKey.includes('log');
+        // 当前缀未配置时，避免误扫整桶普通业务对象
+        if (!ingestConfig.prefix && !hasKnownLogExt && !hasLogLikeToken) {
           continue;
         }