When the material passes through the fine iron remover from the blanking pipe, the material is divided and thinned by the front splitter plate, and then enters the straightening area to turn the iron parts in the material to the direction perpendicular to the pole plate, reducing the resistance of the material layer to the iron parts. When the material carries the iron parts forward to the high field strength adsorption area, it is adsorbed, and rotates to the rear area along with the shell. The iron cleaning work is completed by its gravity and centrifugal force to separate from the strong magnetic field.