diff --git a/tutorials/source_en/advanced_use/mindinsight_commands.md b/tutorials/source_en/advanced_use/mindinsight_commands.md
index 18d466e848b5585c2013b76587e81d518d7e155f..a293747f445bb066b4da2ede1b38f582e47eddaf 100644
--- a/tutorials/source_en/advanced_use/mindinsight_commands.md
+++ b/tutorials/source_en/advanced_use/mindinsight_commands.md
@@ -27,7 +27,7 @@
     - `--config <CONFIG>` : Specifies the configuration file or module. CONFIG indicates the physical file path (file:/path/to/config.py), or a module path (python:path.to.config.module) that can be identified by Python.
     - `--workspace <WORKSPACE>` : Specifies the working directory. The default value of WORKSPACE is $HOME/mindinsight.
     - `--port <PORT>` : Specifies the port number of the web visualization service. The value ranges from 1 to 65535. The default value of PORT is 8080.
-    - `--url-path-prefix <URL_PATH_PREFIX>` : Specifies the path prefix of the web visualization service. The default value of URL_PATH_PREFIX is empty string.
+    - `--url-path-prefix <URL_PATH_PREFIX>` : Specifies the URL path prefix of the web visualization service. URL path prefix consists of segments separated by slashes. Each segment supports alphabets / digits / underscores / dashes / dots, but cannot just be emtpy string / single dot / double dots. The default value of URL_PATH_PREFIX is empty string.
     - `--reload-interval <RELOAD_INTERVAL>` : Specifies the interval (unit: second) for loading data. The value 0 indicates that data is loaded only once. The default value of RELOAD_INTERVAL is 3 seconds.
     - `--summary-base-dir <SUMMARY_BASE_DIR>` : Specifies the root directory for loading training log data. MindInsight traverses the direct subdirectories in this directory and searches for log files. If a direct subdirectory contains log files, it is identified as the log file directory. If a root directory contains log files, it is identified as the log file directory. SUMMARY_BASE_DIR is the current directory path by default.
 
diff --git a/tutorials/source_zh_cn/advanced_use/mindinsight_commands.md b/tutorials/source_zh_cn/advanced_use/mindinsight_commands.md
index f9b1c285819681bc2df5199fb8c5cbecdc9ae916..49e70f303dda58f71f76b103f78c7ca1ddfe1e22 100644
--- a/tutorials/source_zh_cn/advanced_use/mindinsight_commands.md
+++ b/tutorials/source_zh_cn/advanced_use/mindinsight_commands.md
@@ -27,7 +27,7 @@
     - `--config <CONFIG>` : 指定配置文件或配置模块，CONFIG为物理文件路径（file:/path/to/config.py）或Python可识别的模块路径（python:path.to.config.module）。
     - `--workspace <WORKSPACE>` : 指定工作目录路径，WORKSPACE默认为 $HOME/mindinsight。
     - `--port <PORT>` : 指定Web可视化服务端口，取值范围是1~65535，PORT默认为8080。
-    - `--url-path-prefix <URL_PATH_PREFIX>` : 指定Web服务地址前缀，URL_PATH_PREFIX默认为空。
+    - `--url-path-prefix <URL_PATH_PREFIX>` : 指定Web服务URL地址前缀，URL地址前缀由斜杠(/)分隔成多个部分，各部分支持由字母/数字/下划线/连字符/点号组成的字符串，但不能是空字符串/单点号(.)/双点号(..)，URL_PATH_PREFIX默认为空。
     - `--reload-interval <RELOAD_INTERVAL>` : 指定加载数据的时间间隔（单位：秒），设置为0时表示只加载一次数据，RELOAD_INTERVAL默认为3秒。
     - `--summary-base-dir <SUMMARY_BASE_DIR>` : 指定加载训练日志数据的根目录路径，MindInsight将遍历此路径下的直属子目录。若某个直属子目录包含日志文件，则该子目录被识别为日志文件目录，若根目录包含日志文件，则根目录被识别为日志文件目录。SUMMARY_BASE_DIR默认为当前目录路径。