Rotating lifter for dismounting and transporting metro track laying gantry crane

The invention discloses a rotating lifter for dismounting and transporting a metro track laying gantry crane. The rotating lifter comprises a base and a rotating core disc installed on the base, wherein a tower structure is installed on the rotating core disc and comprises two tower bodies capable of adjusting the height and used for supporting hanging lugs of the track laying gantry crane, and a power mechanism for supporting a tray of a cross beam of the track laying gantry crane and driving the tray to vertically move is arranged between two tower bodies. The rotating lifter can rapidly, conveniently and effectively achieve transportation, installation, span change, dismounting and recovery of the track laying gantry crane, is high in safety, saves a large amount of manpower, reduces the labor intensity and can effectively accelerate the construction progress.