Media file playing method and device, medium and browser

A media file playing method and device. The method comprises: submitting information about a media file to a first window; judging whether the first window is a browser top window; if so, creating a sub-window in the browser top window, setting the sub-window as the first window, loading player logic in the browser top window, and playing the media file by using the player logic in the browser top window; otherwise, transmitting, by the first window, the information about the media file to the browser top window to which the first window belongs, and playing the media file by using the player logic in the browser top window. By means of the present invention, it can be achieved that a webpage player window can play a new media file without refreshing when playing requests of other webpage browser windows are received.