The invention discloses a display panel, and a display method and a display device thereof. According to the display panel, a second polarizer is set as a plurality of first sub polarizers and a plurality of second sub polarizers, which are arranged at intervals, wherein each first sub polarizer has the same function as a normal polarizer, an optical axis direction of each first sub polarizer is vertical to a first polarizer; a two-dimensional plane where the optical axis of each second sub polarizer is located forms a preset included angle with the two-dimensional plane where the optical axis of the first polarizer is located, and thus the contrast of light penetrating through the second sub polarizers will be reduced under a large visual angle. Therefore, during normal display of the display panel, all pixel electrodes are started to meet the display of the large visual angle; and when the display panel performs anti-peeping display, only the pixel electrodes corresponding to the second sub polarizers are started, thereof the contrast of the light penetrating through the pixel electrodes is reduced under the large visual angle, the visual angle of a viewer is limited, and thus an anti-peeping display effect is realized. Compared with the prior art, the display panel disclosed by the invention has the advantages that the switch between normal display and anti-peeping display can be realized without using an additional switching device.