The embodiment of the invention provides a slope crosspiece control system, which comprises a fixing base, a crosspiece, a rotating device, a flexible piston and a power device, wherein the fixing base is fixedly arranged on the ground of a slope mine; the crosspiece is hinged with the fixing base and is used for blocking vehicles to move forwards; a first end of the rotating device is hinged with the fixing base, a second end of the rotating device is hinged with a sliding block, and the sliding block is inserted into a sliding rail arranged on the crosspiece; one end of the flexible piston is hinged with the fixing base, and the other end of the flexible piston is hinged with a third end of the rotating device; rotating shafts at each hinged joint are parallel mutually, and the sliding rail is perpendicular to the rotating shafts; a plane formed by the first end, the second end and the third end of the rotating device is perpendicular to the rotating shafts; the power device is connected with the flexible piston and is used for driving the flexible piston to stretch and retract; and the rotating device is driven by the flexible piston to open and close the crosspiece, so the efficiency of operating the crosspiece by workers is improved.