diff --git a/website/docs/en/guide/advanced/env-vars.mdx b/website/docs/en/guide/advanced/env-vars.mdx
index 7a66c75442..d8dd2c9094 100644
--- a/website/docs/en/guide/advanced/env-vars.mdx
+++ b/website/docs/en/guide/advanced/env-vars.mdx
@@ -215,7 +215,7 @@ For example, set the env mode as `test`:
 npx rsbuild dev --env-mode test
 ```
 
-Rsbuild will then read the following files in sequence:
+Rsbuild will read these files in the following order and merge their contents. If the same environment variable is defined in multiple files, values from files loaded later will override those from files loaded earlier:
 
 - .env
 - .env.local
diff --git a/website/docs/zh/guide/advanced/env-vars.mdx b/website/docs/zh/guide/advanced/env-vars.mdx
index 472a2c287d..c2acdeb07b 100644
--- a/website/docs/zh/guide/advanced/env-vars.mdx
+++ b/website/docs/zh/guide/advanced/env-vars.mdx
@@ -215,7 +215,7 @@ Rsbuild 也支持读取 `.env.[mode]` 和 `.env.[mode].local` 文件，你可以
 npx rsbuild dev --env-mode test
 ```
 
-Rsbuild 会依次读取以下文件：
+Rsbuild 会按照以下顺序读取这些文件，并合并它们的内容。如果存在同名环境变量，后读取的文件将会覆盖先读取的文件中的值：
 
 - .env
 - .env.local