The invention relates to an end grinding device for an internal combustion engine air inlet and exhaust valve. The device structurally comprises a rolling wheel, a base frame, a motor, a controller, aspeed regulator, a protective cover, a limiting rod and a grinding wheel, wherein the base frame is of a concave shape, the outer surface of the base frame is hard, the middle part of the base frameis hollowed out, the left side and the right side of the base frame are equal and parallel, and the speed regulator is arranged on the controller. The end grinding device for the internal combustion engine air inlet and exhaust valve has the beneficial effects that the speed regulator is arranged, a rotating speed is changed by rotating a speed adjusting knob and then through a speed change chip,then processing is carried out by a processor, and then a controlled object is controlled to run through cooperation with an executor, so that the speed of end grinding can be increased or decreased according to the product condition, the precision of the grinding operation is enhanced, and therefore the end grinding can be completed only by single feeding, and the working efficiency is improved;and the surface quality of workpieces subjected to end grinding is further improved, the efficiency of the workpieces end grinding is improved, the labor intensity of workers is reduced, and the quality and the yield of end products can be considered.