Metal pipeline rust cleaning device

The utility model discloses a metal pipeline derusting device, which belongs to the field of pipeline treatment devices and comprises a driving disc and a driving motor mounted on one side surface of the driving disc, the driving motor is connected with a supporting component through a mounting ring, and the side wall of the driving disc is fixedly connected with a plurality of inner magnets and mounting blocks which are uniformly distributed at equal intervals. The mounting block is connected with a driving wheel through a first spring, the driving disc is sleeved with a mounting cover, the outer side face of the mounting cover is fixedly connected with an outer magnet, multiple sets of supporting plates are distributed on the inner side face of the mounting cover at equal intervals, and grinding assemblies are mounted on the supporting plates. When the metal pipe derusting device is used for derusting a large-size metal pipe, the driving motor can drive the driving disc and the inner magnet to rotate on the