Based on the principle of magnetic grinding,a double-disk magnetic tool passivation method was proposed,and the influences of disk spacing,disk speed,tool speed and passivation time on the passivation amount of the front and rear tool surfaces were investigated through orthogonal tests.The influence of passivation on the surface quality of the tool was investigated.The results show that the grinding marks on the surface of the carbide end mill prepared by using the double-disk magnetic passivation method are effectively removed,and the surface roughness is reduced from 0.235 μm to 0.814 μm along the grinding direction and reduced from 0.313 μm to 0.215 μm perpendicular to the grinding direction.