NdFeB magnet is RE2FE14B intermetallic compounds based on permanent magnets. NdFeB has a very high energy product and coercivity force, known as the world's first three-generation magnet, the magnet is the strongest magnetic force. At the same time the advantages of high energy density, so that NdFeB permanent magnet material in modern industry and electronic technology has gained wide application, making toys, instruments and meters, electro-acoustic electric, magnetic magnetization, home appliances and other equipment, miniaturization, light weight , thin possible.