Compensation method and device of display panel and display device

The embodiment of the invention discloses a compensation method and device of a display panel and a display device. The compensation method comprises the following steps: determining a first ghostingcompensation value, a second ghosting compensation value... and an nth ghosting compensation value according to a current display gray scale, display duration and a pre-display gray scale; determininga first display gray scale, a second display gray scale... and an nth display gray scale according to the first ghost compensation value, the second ghost compensation value... and the nth ghost compensation value; wherein the absolute values of the differences between the first display gray scale, the second display gray scale,..., and the nth display gray scale and the pre-display gray scale are gradually reduced; driving the display panel to sequentially display the first display gray scale, the second display gray scale... and the nth display gray scale when the current display gray scaleis displayed; and driving