The invention discloses a neodymium iron boron magnet surface anti-corrosion treatment method. The method comprises two steps of pretreatment and anti-corrosion treatment. According to the method, after abrasive pretreatment is performed, the roughness of a neodymium iron boron magnet is between 0.2-2.0 micrometers, phosphating can be directly carried out, the corrosion resistance of phosphated products subjected to acid pickling can be effectively improved, and the phenomenon of appearance inconsistency of the directly-phosphated products without being subjected to acid pickling can be avoided; electroplating can be directly carried out without degreasing and acid pickling, so that the influence on the hydrogen content on the surface and the influence on the magnetic flux of the productsin the acid pickling process are avoided; and electrophoresis, spraying or physical vapor deposition and the like can be directly carried out without phosphating, so that the influence on the hydrogencontent on the surface and the influence on the magnetic flux of the products in the acid pickling process are avoided, steps such as phosphating are saved, so that uncontrollable factors of the phosphating process are reduced, and waste water and waste residues are not generated, so that the environmental protection performance of the production process is improved.