Neodymium magnets belong to the rare earth magnets. it including to two kinds of magnets according to the diffrenet production process, sintered NdFeB magnet and Bonded NdFeB magnet. The Sintered Neodymium-Iron-Boron(NdFeB) magnet is the Third Generation of Rare Earth magnets, The magnets are the most powerful and advanced commercialized permanent magnets today.