NdFeB magnet, the third generation of the rare-earth permanent NdFeB, is the strongest permanent magnets contemporary. With high potential magnetic properties, NdFeB magnet can pick up the objects 640 times as heavy as itself. It is easier to be cut, drilled, capable to process to complex shapes and coated by its better mechanical properties. For having such superior properties, NdFeB magnet now have widely applied in aviation, electronic, motors, instruments and meters, and medical equipment etc. and no doubt that will be used wider in non-technological field.