The invention relates to crushing equipment, in particular to a maize multi-stage crushing equipment for pig feed preparation. The maize multi-stage crushing equipment for pig feed preparation does not waste raw materials and is uniform in breaking. In order to achieve the technical aim, the maize multi-stage crushing equipment for pig feed preparation comprises a mounting plate, a mounting frame,supporting rods, a frame body, first springs, a first net plate and the like; the mounting frame is arranged on the mounting plate, the supporting rods are arranged on the upper portions of the innersides of the left wall and the right wall of the mounting frame, the frame body is connected between the inner sides of the supporting rods, a discharging hole is formed in the center of the bottom of the frame body, and the first springs are arranged at the bottom in the frame body in a bilateral symmetry manner. The effects that the raw materials are not wasted, and crushing is uniform are achieved, a crushing block is used for carrying out first-time crushing on maize, through a grinding block, second-time crushing is carried out, the first net plate and an arc net plate are subject to work division, and maize with disqualified crushing is prevented from entering the collecting frame.