A playback control method of a multimedia device is provided for setting playback position and repetitive playback section of a multimedia file playing on the multimedia device intuitively with multi-touch behaviors on a touchscreen. The method includes sensing a multi-touch event on the touchscreen, extracting two contact points of the multi-touch event, determining coordinates of the contact points, calculating a distance between the coordinates, monitoring a variation of the distance, moving a playback position of a current playing multimedia file according to the variation of the distance, and restarting playback of the current playing multimedia file from the playback position when the contact points are released from the touchscreen.