Magnetic column device for purifying water tank and purifying method thereof

The invention relates to a magnetic column device for purifying a water tank. The invention discloses a magnetic column device for purifying a water tank. The magnetic column device comprises a shell and a magnetic column body, the magnetic column body comprises a bottom plate and a plurality of magnetic columns arranged on the bottom plate; the shape of the shell is matched with that of the magnetic column body; the magnetic column body is detachably mounted in the shell; and the magnetic column device is used for adsorbing magnetic particles. According to the portable magnetic column device for purifying the water tank, the magnetic column body and the shell can be rapidly disassembled and assembled, when the water tank needs to be purified, only the magnetic column body and the shell need to be assembled and placed at a water outlet of the water tank, small scrap iron and the like in the water tank can be adsorbed to the surface of the shell, and after the scrap adsorption capacity of the surface of the sh