he characteristic of NdFeB magnet is that its molecules are very active and it is easy to react with oxygen in the air. In order to stabilize it and give full play to its energy. After a long time of exploration, it is concluded that the electroplated coating on the surface can make it stable. At present, the surface treatments of magnets include zinc plating, nickel plating, blue white zinc plating, epoxy resin plating, etc.