The present invention relates to a display method of a display panel, a display panel and a display device, and the display method of a display panel is used for enabling each row of N pixel units in the display panel to display an image having 2N+x-1 pixel points. The display method comprises steps of: acquiring an image, each row of which comprises 2N+x-1 pixel points corresponding to the N pixel units; and determining a display parameter of each sub-pixel according to the components, which have the same color as the sub-pixel, in the pixel points corresponding to the sub-pixel.