An interface updating method for touch screen and a multimedia electronic device are provided, which are used for solving the problem of how to update a display interface of a touch screen according to the slide operating characteristics of a controller. When the controller slides on the touch screen, the operating characteristics of the controller are determined based on the predetermined number of pixel point samples that the slide trail of the controller goes through at last. The interface is updated according to the operating characteristics of the controller. The interface adjustment visually obtains an effect corresponding to the movement of the controller.