diff --git a/zc-business/src/main/java/com/zc/business/controller/DcFileDownloadController.java b/zc-business/src/main/java/com/zc/business/controller/DcFileDownloadController.java
index 59dad0bb..44db0d4b 100644
--- a/zc-business/src/main/java/com/zc/business/controller/DcFileDownloadController.java
+++ b/zc-business/src/main/java/com/zc/business/controller/DcFileDownloadController.java
@@ -37,9 +37,9 @@ public class DcFileDownloadController extends BaseController {
     @Autowired
     private ServerConfig serverConfig;
     /**
-     * 默认大小 20M
+     * 默认大小 30M
      */
-    public static final long DEFAULT_MAX_SIZE = 20 * 1024 * 1024;
+    public static final long DEFAULT_MAX_SIZE = 30 * 1024 * 1024;
     /**
      * 查询文件管理列表
      */