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+++ b/README.md
@@ -1,2 +1,50 @@
 # vite-plugin-global-const
+
 Define constants for your project to facilitate reuse of your code across multiple products
+
+## INSTALL
+
+```bash
+npm i vite-plugin-global-const -D
+#or
+yarn add vite-plugin-global-const -D
+```
+
+## CONFIG
+
+In your `vite.config.js`, you can add your global constants to the plugin options.For example:
+
+```js
+// vite.config.js
+import { defineConfig } from 'vite'
+import {globalConst} from 'vite-plugin-global-const'
+
+export default defineConfig({
+  plugins: [
+    globalConst({
+      // Global constants for your needs
+      MAIN: true
+    }),
+  ],
+})
+
+```
+
+## USAGE
+
+You can use the global constants in your code, they are injected into the `import.meta.env` object.For example:
+
+```js
+// content.js
+const main = import.meta.env.MAIN
+console.log(main)
+```
+
+```console
+# browser console/terminal
+true
+```
+
+## LAST
+
+If you have any questions, please submit an issue, thank you for your support, and if you like this plugin, please give me a star, thank you!
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