Iron pipe welding seam polishing mechanism

The utility model relates to the technical field of polishing mechanisms, and discloses an iron pipe welding seam polishing mechanism which comprises an equipment body, the equipment body comprises a supporting seat, the bottom of the supporting seat is fixedly connected with a base, the left side of the supporting seat is fixedly provided with a first motor and a limiting mechanism, and the limiting mechanism comprises a limiting groove. One end of the limiting groove is fixedly connected with a reset spring and a clamping assembly, and the clamping assembly is fixedly connected with a first motor. By arranging a limiting groove, a reset spring, a limiting block, a supporting rod, a first threaded rod and a handle, when the supporting rod moves to a designated position, the handle is rotated to enable the first threaded rod to advance in the direction of the supporting rod for limiting, the reset spring at the other end fixes a supporting seat through elastic force, and the situation that the supporting seat