Rare earth permanent magnet materials refer to permanent magnet materials made of alloys formed by rare earth metals and transition metals through a certain process. Rare earth permanent magnet materials have been widely used in the fields of machinery, electronics, instrumentation and medical treatment. New magnetic materials mainly include permanent magnetic materials, soft magnetic materials, letter magnetic materials, special magnetic materials, etc., covering many high-tech fields. In the fields of rare earth permanent magnet material technology, permanent magnet ferrite technology, amorphous soft magnetic material technology, soft ferrite technology, microwave ferrite device technology, and special equipment technology for magnetic materials, a huge industry group has been formed around the world.