Anti-corrosion device for metal pipeline

The utility model discloses an anti-corrosion device for a metal pipeline, and particularly relates to the field of pipeline protection, the anti-corrosion device for the metal pipeline comprises a hollow pipe inserted in the metal pipeline, a supporting rod located on the outer surface of the hollow pipe and a fixing block rotationally connected with the supporting rod, and the fixing block is fixedly arranged on the outer surface of the hollow pipe. And one end of the hollow pipe is fixedly sleeved with a limiting ring, one side of the supporting rod is rotationally connected with a supporting rod, and the outer surface of the hollow pipe is sleeved with a moving ring and a supporting ring. Firstly, the rotating rings are rotated to sequentially drive the rotating rods to rotate so as to drive one ends of the supporting rods to move through the moving rings, the hollow pipe can be conveniently fixed in the metal pipeline, installation is convenient, meanwhile, through cooperation of the supporting rods and