The embodiment of the invention discloses an automatic lighting fixture for a
liquid crystal screen. The automatic lighting fixture comprises a bottom plate, a
liquid crystal screen bracket, a probe pressing block for fixing probes, two horizontal sliding guide rails, horizontal sliding seats, two perpendicular fixing plates, a
cam structure and a U-shaped lifting support; the horizontal sliding guide rails are both located on the outer side of the edge, close to a lighting switch, in the
liquid crystal screen bracket, and the length directions of the horizontal sliding guide rails are both perpendicular to the edge, close to the lighting switch, in the liquid
crystal screen bracket; the horizontal sliding seats are arranged on the corresponding sliding guide rails and can move on the sliding guide rails; each perpendicular fixing plate is perpendicular to the corresponding horizontal sliding seat; the
cam structure is fixedly arranged on the bottom plate, the U-shaped lifting support comprises two side plates and the bottom plate, one side plate is located above a
cam of the cam structure and provided with a cam groove matched with the cam, the inner side face of the bottom plate is connected with vertical sliding guide rails arranged on the two perpendicular fixing plate in a sliding mode respectively, and the probe pressing block is arranged on the outer side face of the bottom plate. The automatic lighting fixture for the liquid
crystal screen can effectively avoid a liquid
crystal screen from colliding with the probes.