diff --git a/docs/en/administrator-guide/config/fe_config.md b/docs/en/administrator-guide/config/fe_config.md
index db4cd53d42..a0fbb86c19 100644
--- a/docs/en/administrator-guide/config/fe_config.md
+++ b/docs/en/administrator-guide/config/fe_config.md
@@ -185,9 +185,9 @@ HTTP Server V2 is implemented by SpringBoot. It uses an architecture that separa
 
 ### http_max_request_size
 
-Default：100M
+Default：100MB
 
-The above two parameters are the http v2 version, the web maximum upload file limit, the default is 100M, you can modify it according to your needs.
+The above two parameters are the http v2 version, the web maximum upload file limit, the default is 100MB, you can modify it according to your needs.
 
 ### frontend_address
 
diff --git a/docs/zh-CN/administrator-guide/config/fe_config.md b/docs/zh-CN/administrator-guide/config/fe_config.md
index 612704f3e5..48df2ea9dc 100644
--- a/docs/zh-CN/administrator-guide/config/fe_config.md
+++ b/docs/zh-CN/administrator-guide/config/fe_config.md
@@ -184,9 +184,9 @@ HTTP Server V2 由 SpringBoot 实现。它采用前后端分离的架构。只
 
 ### http_max_request_size
 
-默认值：100M
+默认值：100MB
 
-以上两个参数是http v2版本，web最大上传文件限制，默认100M，可以根据自己需要修改
+以上两个参数是http v2版本，web最大上传文件限制，默认100MB，可以根据自己需要修改
 
 ### default_max_filter_ratio
 
diff --git a/fe/fe-core/src/main/java/org/apache/doris/common/Config.java b/fe/fe-core/src/main/java/org/apache/doris/common/Config.java
index fc511db21f..9d351def23 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/common/Config.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/common/Config.java
@@ -326,10 +326,10 @@ public class Config extends ConfigBase {
     @ConfField public static int http_backlog_num = 1024;
 
     /**
-     *Maximum file limit for single upload of web request, default value: 100M
+     *Maximum file limit for single upload of web request, default value: 100MB
      */
-    @ConfField public static String http_max_file_size = "100M";
-    @ConfField public static String http_max_request_size = "100M";
+    @ConfField public static String http_max_file_size = "100MB";
+    @ConfField public static String http_max_request_size = "100MB";
 
     /**
      * The backlog_num for mysql nio server