diff --git a/src/main/java/com/threecloud/dataserviceyy/service/VaaSyncService.java b/src/main/java/com/threecloud/dataserviceyy/service/VaaSyncService.java
index 8de79eb..ffc7fc9 100644
--- a/src/main/java/com/threecloud/dataserviceyy/service/VaaSyncService.java
+++ b/src/main/java/com/threecloud/dataserviceyy/service/VaaSyncService.java
@@ -277,7 +277,27 @@ public class VaaSyncService {
                 (int) (endTime - begTime), channelPhone, phone, isOutgoing, isAnswered);
 
         // 下载录音文件（无重试）
-        if (!Files.exists(localFile) || Files.size(localFile) == 0) {
+        // 文件不存在、大小为0、或小于1KB（可能损坏）时重新下载
+        boolean needDownload = !Files.exists(localFile) || Files.size(localFile) < 1024;
+        // 额外校验：已存在文件也可能是HTML错误页面，检查文件头
+        if (!needDownload) {
+            try {
+                byte[] header = new byte[16];
+                try (java.io.RandomAccessFile raf = new java.io.RandomAccessFile(localFile.toFile(), "r")) {
+                    raf.readFully(header);
+                }
+                String headerStr = new String(header, "ASCII").trim().toLowerCase();
+                if (headerStr.startsWith("<!doctype") || headerStr.startsWith("<html")) {
+                    logger.warn("【录音】本地文件为HTML页面，重新下载: {}", fileName);
+                    needDownload = true;
+                    Files.delete(localFile);
+                }
+            } catch (Exception e) {
+                logger.warn("【录音】校验本地文件失败，重新下载: {}", fileName);
+                needDownload = true;
+            }
+        }
+        if (needDownload) {
             String fileUrl = "http://" + deviceHost + filePath;
             vaaHttpUtil.httpDown(fileUrl, localPath, authToken);
             logger.info("【录音】下载完成: {} ({} 字节)", fileName, Files.size(localFile));
diff --git a/src/main/java/com/threecloud/dataserviceyy/util/VaaHttpUtil.java b/src/main/java/com/threecloud/dataserviceyy/util/VaaHttpUtil.java
index bb88b0c..501b6d6 100644
--- a/src/main/java/com/threecloud/dataserviceyy/util/VaaHttpUtil.java
+++ b/src/main/java/com/threecloud/dataserviceyy/util/VaaHttpUtil.java
@@ -163,12 +163,28 @@ public class VaaHttpUtil {
                 logger.info("录音文件下载完成: {}, 大小: {} bytes ({} MB)",
                         savePath, totalBytes, totalBytes / 1024 / 1024);
 
-                // 完整性校验：如果服务器返回了Content-Length，校验实际下载大小
+                // 完整性校验
                 if (expectedSize > 0 && totalBytes != expectedSize) {
                     saveFile.delete();
                     throw new RuntimeException(String.format(
                             "文件下载不完整: 期望 %d bytes, 实际 %d bytes", expectedSize, totalBytes));
                 }
+                // 录音文件至少应有1KB，过小说明下载异常
+                if (totalBytes < 1024) {
+                    saveFile.delete();
+                    throw new RuntimeException(String.format(
+                            "文件过小，可能下载异常: 仅 %d bytes", totalBytes));
+                }
+                // 校验文件头，确保不是HTML错误页面
+                byte[] header = new byte[(int) Math.min(totalBytes, 16)];
+                try (java.io.RandomAccessFile raf = new java.io.RandomAccessFile(saveFile, "r")) {
+                    raf.readFully(header);
+                }
+                String headerStr = new String(header, "ASCII").trim().toLowerCase();
+                if (headerStr.startsWith("<!doctype") || headerStr.startsWith("<html")) {
+                    saveFile.delete();
+                    throw new RuntimeException("下载内容为HTML页面，非音频文件");
+                }
             } else {
                 throw new RuntimeException("文件下载失败，HTTP状态码: " + responseCode);
             }