NdFeB is a third-generation rare earth permanent magnet material. It has the characteristics of small volume, light weight and strong magnetic properties. It is the best magnet with the best performance-price ratio. It is known as the “Magnetic King” in the magnetic field, in the bare magnetic state. The magnetic force can reach about 3500 Gauss. It is widely used in energy, transportation, machinery, medical, IT, home appliances and other industries, especially with the development of the knowledge economy represented by information technology, the rare earth permanent magnet NdFeB industrial functional materials continue to bring new uses, and are widely used in electronic products such as hard disks, mobile phones, earphones, and batteries. Powered tools, etc., NdFeB has become an indispensable functional material for modern industry.