diff --git a/.env b/.env
index ace03e36..d2d7f54c 100644
--- a/.env
+++ b/.env
@@ -1,3 +1,5 @@
+# the base url of the application, the default is "/"
+# if use a sub directory, it must be end with "/", like "/admin/" but not "/admin"
 VITE_BASE_URL=/
 
 VITE_APP_TITLE=SoybeanAdmin