The main permanent magnet material NdFeB rare earth metal neodymium (Nd: 29 - 32.5%), iron metal elements (Fe: 63.95 - 68.65%), non-metallic elements boron (B :1.1 - 1 .2%), small amounts of adding dysprosium (Dy :0.6-1 .2%), niobium (Nb :0.3-0 .5%), aluminum (Al :0.3-0 .5%), copper (Cu :0.05-0 .15%) and other elements. NdFeB permanent magnet three elements material as the matrix is Nd2Fe14B compound, the composition should be similar to the formula with a compound Nd2Fe14B but completely by Nd2Fe14B composition ratio, the magnets can be very low or non-magnetic. only among NdFeB magnet than the actual content of Nd2Fe14B NdFeB content of the compound for a long time to get better magnetic properties.