Method for demagnetizing neodymium-iron-boron permanent magnet

The invention provides a neodymium-iron-boron permanent magnet demagnetization method, and relates to the technical field of permanent magnet demagnetization method.The neodymium-iron-boron permanent magnet demagnetization method at least comprises the steps of (I) coating, specifically, the outer side of a magnetized product is coated with foil paper, (II) boxing, specifically, the coated product is put into a containing box, (III) entering a furnace, specifically, the containing box is put into a high-temperature furnace, and the high-temperature furnace is heated to the room temperature; and (IV) discharging from the furnace: taking out the accommodating box, opening the foil paper, and taking out the demagnetized product; a high-temperature heating mode is adopted to demagnetize a magnetized product, and before high-temperature demagnetization, the product is subjected to double protection of foil paper coating and boxing, so that the problem that the magnetic performance and the bearing capacity of the p