A display panel and a display device, the display panel includes an array substrate; wherein the array substrate includes a common electrode, a first insulation layer, a plurality of pixel electrodes and an alignment layer; the common electrode, first insulation layer, plurality of pixel electrodes and alignment layer are successively arranged; at least one first through hole is defined in the first insulation layer, and the alignment layer contacts with the common electrode via the at least one first through hole. By arranging in such a manner, although a thin-film transistor stays in a turn-on state for an extremely short time, however, since the common electrode is always in a conductive state, so that the electrostatic charge remaining on the alignment layer can be conducted away by the common electrode, thereby reducing the electrostatic charge remaining on the alignment layer, and thus improving display quality of display panel.