diff --git a/src/main/java/com/ai/da/common/utils/MinioUtil.java b/src/main/java/com/ai/da/common/utils/MinioUtil.java
index b15fdf2f..484b05e3 100644
--- a/src/main/java/com/ai/da/common/utils/MinioUtil.java
+++ b/src/main/java/com/ai/da/common/utils/MinioUtil.java
@@ -52,6 +52,18 @@ public class MinioUtil {
         return minioClient;
     }
 
+    @Autowired
+    private RedisUtil redisUtil;
+
+    /**
+     * Redis缓存key前缀，用于Minio签名URL缓存
+     */
+    private static final String REDIS_MINIO_URL_PREFIX = "minio:url:";
+
+    /**
+     * 签名URL缓存过期时间（秒），默认1天
+     */
+    private static final long URL_CACHE_EXPIRE_SECONDS = 24 * 60 * 60;
     /**
      * description: 判断bucket是否存在，不存在则创建
      *
@@ -392,6 +404,11 @@ public class MinioUtil {
      * @return 文件的临时URL，如果出现异常则返回null
      */
     public String getPreSignedUrl(String bucketName, String fileName, int expiry) {
+        String cacheKey = REDIS_MINIO_URL_PREFIX + bucketName + "/" + fileName;
+        Object cachedUrl = redisUtil.getFromString(cacheKey);
+        if (cachedUrl != null) {
+            return cachedUrl.toString();
+        }
         try {
 
             String lowerName = fileName.toLowerCase();
@@ -419,8 +436,9 @@ public class MinioUtil {
 
                 builder.extraQueryParams(queryParams);
             }
-
-            return minioClient.getPresignedObjectUrl(builder.build());
+            String presignedObjectUrl = minioClient.getPresignedObjectUrl(builder.build());
+            redisUtil.addToString(cacheKey, presignedObjectUrl, URL_CACHE_EXPIRE_SECONDS);
+            return presignedObjectUrl;
         } catch (MinioException | InvalidKeyException
                  | IOException | NoSuchAlgorithmException | IllegalArgumentException e) {
             e.printStackTrace();