A plurality of magnetic frames or magnetic grids are installed in the assembly box, and the magnetic bars at different levels are staggered to fill the box with a strong magnetic field. Such a strong magnetic filtering device is called a drawer type magnetic separator. This design ensures that the material flowing through the magnetic drawer separator can contact with magnetic bars well. Then more effectively separate small metal impurities. It is an ideal product for separating small impurities. Our magnetic drawer separators are widely used in food, medicine, chemical industry and other industries.