With its unique position in rare earth field, neodymium has become a hot spot in the market for many years. The largest user of metal neodymium is NdFeB permanent magnet material. The advent of Nd-Fe-B permanent magnets has injected new vitality and vitality into the field of rare earth high-tech. Nd-Fe-B magnet is called "the king of permanent magnets" because of its high magnetic energy product. It is widely used in electronics, machinery and other industries for its excellent performance. The successful development of alpha magnetic spectrometer indicates that the magnetic properties of Nd-Fe-B magnets in China have stepped into the first-class level in the world. Neodymium is also used in nonferrous metals.