Abstract: Provided is a neodymium-iron-boron magnet, obtained by processing neodymium-iron-boron raw material powders coated with modified powders, wherein the modified powders comprise heavy rare earth element oxide powders and/or heavy rare earth element fluoride powders, specially, heavy rare earth fluoride or oxide powders are used to coat on the surface of the magnetic powders, so that diffusion occurs simultaneously during the subsequent sintering. In addition, during the sintering process, the heavy rare earth oxide or fluoride powders coated on the surface of the magnetic powders substitute part of the light rare earth and the heavy rare earth is absorbed by the magnets, thereby increasing coercive force and effectively inhibiting the reduction of the residual magnetism. In the present disclosure, by using small amount of heavy rare earth element, the coercive force of magnets is increased, which saves rare earth metal sources and production cost.