diff --git a/README.md b/README.md
index cee9190b24..d7949b22e1 100644
--- a/README.md
+++ b/README.md
@@ -136,7 +136,7 @@ MindSpore tutorials and API documentation can be generated by the [Sphinx](https
 
    ```bash
    git clone repository_link
-   export environment_variable = corresponds_to_the_local_path_of_the_clone_repository
+   export environment_variable=corresponds_to_the_local_path_of_the_clone_repository
    ```
 
 2. When the API of Lite is built, Doxygen needs to be installed. Then download the latest Lite tar package, and configure the local packet path to the LITE_PACKAGE_PATH environment variable: