The invention provides a multi-window switching method and system for a touch screen terminal. The method comprises the steps that responding to multi-window switching trigger operation acting on a current page displayed on a full screen of a client, multi-window switching of all opened pages in the client is started, wherein the multi-window switching trigger operation is a two-point touch gesture, and the distance between two touch points gradually becomes smaller; thumbnails of all the opened pages in the client are arranged and displayed according to preset sizes in the client, and accordingly partial or all of the opened pages in the client are displayed; and responding to selection operation on the thumbnails, the current page is switched to a page corresponding to a selected thumbnail. By use of the multi-window switching method and system, a user can switch webpages more visually and conveniently on a mobile terminal on the basis of not breaking browsing coherence.