A method for driving a liquid crystal display panel is disclosed. The liquid crystal display panel comprises a plurality of sub pixels, and the method comprises presenting images to be displayed on the liquid crystal display panel frame by frame through regulating a gray-scale of each sub pixel of the liquid crystal display panel, wherein durations of image frames are not all equal to one another so as to reduce a direct current bias voltage of the sub pixel. According to the method, the direct current bias voltage during the isochronous driving process can be effectively reduced, and thus the afterimage of the liquid crystal display panel can be alleviated.