Disclosed are a magnetic roller damping device and an implementing method thereof. The device includes a magnetic roller and a magnetic damping mechanism. The magnetic roller includes a first multipole magnet that includes at least one pair of magnetic poles with opposite polarities. The magnetic damping mechanism uses a magnetic damping magnet or metal attractable to the first multipole magnet, the magnetic damping magnet or metal is positioned in a magnetic field of the first multipole magnet, and a distance between the magnetic damping magnet or metal and the magnetic roller is adjustable.