The invention provides a lighting test circuit and a lighting test method. The lighting test circuit is applied to a display module and the display module comprises N common electrode wires; N is an integer greater than 1; the lighting test circuit comprises a common electrode wire on-off unit which is respectively connected with an on-off control wire and the N common electrode wires and is usedfor controlling the on or off of the connection between every two common electrode wires under the control of an on-off control signal on the on-off control wire; and an on-off control unit, wherein the on-off control unit is connected with the on-off control wire and is used for providing the on-off control signal for the on-off control wire. According to the invention, the problems that a checkerboard picture cannot be displayed when the box lighting test is carried out and poor touch control cannot be detected, because the common electrode voltage difference is eliminated by connecting thefirst common electrode wire and the second common electrode wire with the same pin of a lighting signal source chip in the prior art, is solved.