The invention discloses a sintered neodymium iron boron magnet dysprosium treatment process, comprising the following steps of: (1) preparation of a magnet black wafer; (2) surface treatment of the magnet black wafer; (3) preparation of treatment material paste; (4) coating; (5) dysprosium treatment heat treatment; and (6) low-temperature tempering. The method coats the surface of the sintered neodymium iron boron magnet with the treatment material paste so as to form a treatment material powder coating, and then forms a layer having high intrinsic coercive force on the surface of the sinteredneodymium iron boron magnet by the dysprosium treatment heat treatment and the low-temperature tempering treatment so as to improve the coercive force of the sintered neodymium iron boron magnet. Themethod has low requirements for equipment, is easy to operate and low in cost, can realize mass production and is easy to popularize.