Strong practicability: the workpiece from the demagnetizing machine through the middle hole can achieve the effect of automatic type and manual type two; Various styles: can be customized, can be made into U-shaped structure according to user needs to make chain belt type, trolley type, etc.; The demagnetizer coil is optimized according to the principle of electromagnetic induction and adopts full wave current waveform demagnetizing, which has low power consumption and strong anti-interference force.