The invention relates to the technical field of mechanical equipment, in particular to a grinding device. The grinding device comprises a base and further comprises an adjusting frame, a loading component, a telescopic frame, a motor and a grinding component, wherein the adjusting frame is arranged on one side of the upper end of the base. The grinding component comprises a main case, clamping and connecting blocks, a first adjusting base, an adjusting handle, a transmission shaft, an outer barrel, an inner gathering piece, a liner plate, a first spring, an end plate and a center shaft. A clamping and connecting installing groove is formed in the side wall of the main case in an inward-concave manner. A drive installing groove is formed in the lower portion of the main case in an inward-concave manner. A main adjusting groove is formed in the side wall of the first adjusting base in an inward-concave manner. The main adjusting groove adapts to the adjusting handle. The transmission shaft is in a cylinder shape. The grinding device is convenient to operate and adjust, the grinding efficiency is high, and the grinding quality is good.