Bonded NdFeB magnets are mainly prepared by mixing NdFeB powder and adhesives (epoxy resin, nylon, polyphenylene sulfide, etc.) through pressing, injection molding and extrusion molding. This preparation process makes the magnet easy to be made into various complicated shapes, has very high dimensional accuracy and uniform magnetic properties, and has high batch consistency and repeatability of the product. At the same time, the magnet also has the advantages of strong oxidation resistance and large freedom of magnetizing direction. Bonded neodymium iron boron magnets are mainly used in various types of micro-special motors in the fields of computers, printers, household appliances, electric tools, and automobiles.