I instal simpleSamlPHP Service provider and Identity provider side. The connection work but each time the user have to pass by this page of the identityProvider for autentificate him :
How can i do for modify this page or remplace it by my own connection page without change the result?
Have a look at theming the user interface on the SimpleSaml website. Per that page
In SimpleSAMLphp every part that needs to interact with the user by using a web page, uses templates to present the XHTML. SimpleSAMLphp comes with a default set of templates that presents a anonymous look.
You may create your own theme, where you add one or more template files that will override the default ones. This document explains how to achieve that.