Abstract:The sintered Nd-Fe-B permanent magnetic materials，as the mainstream permanent magnet material in today''s society，have been widely used in the market because of its relatively low price，wide range of applications and outstanding magnetic properties. In order to meet the goal of lightweight and miniaturization development of modern science and promote the comprehensive and balanced utilization of rare earth resources，enterprises not only need to reduce the manufacturing cost to the greatest extent，but also to ensure that the magnetic properties of sintered Nd-Fe-B magnets meet the needs of society. In this paper，based on the magnetic properties of sintered Nd-Fe-B products such as composition，anisotropy，coercivity and magnetic energy product，combined with the main methods of grain boundary diffusion，grain boundary doping and grain refinement to improve the magnetic properties of Nd-Fe-B at the present stage，through the recent research on magnetic properties of related magnets，the possibility and direction of the magnetic properties of sintered Nd-Fe-B magnetic materials in industry is improved.