Magnetic chuck

The invention relates to a magnetic device, and discloses a magnetic sucker, the side edge of a sucker body is surrounded by a baffle plate, and the edge of the sucker body is provided with a mounting strip; an inserting groove is formed in the upper side face of the mounting strip in the length direction of the mounting strip, and an inserting plate inserted into the inserting groove extends from the lower edge of the baffle; according to the magnetic suction cup, a partition space can be formed through the baffles arranged on the periphery of the suction cup body in a surrounding mode, sand grains generated in the grinding process of a workpiece attracted to the magnetic suction cup are prevented from being sputtered on the working ground, the grinding efficiency is improved, and the grinding quality is improved. Therefore, the probability that workers slip accidentally is reduced, and the safety of the working environment is improved. The inserting plates and the inserting grooves are matched in an inserti