Pre-fabricated part lifting device

The invention relates to a pre-fabricated part lifting device. The pre-fabricated part lifting device comprises a rack travelling mechanism, a lifting mechanism and a lifting tool, the rack travelingmechanism comprises a travelling frame and a first travelling part, a transverse supporting rail is arranged on a supporting frame, a longitudinal travelling rail is arranged on the transverse supporting rail, and the longitudinal travelling rail can move horizontally along the transverse supporting rail; the lifting mechanism comprises a bracket and a second travelling part, a lifting and transporting part is arranged on the bracket, the lifting and transporting part is connected with the lifting tool, the lifting tool comprises a lifting frame and lifting hook assemblies, at least two guidelongitudinal beams are arranged at the bottom of the lifting frame, the lifting hook assemblies are arranged on each guide longitudinal beam, and a lifting hook driving assembly is arranged on each lifting hook assembly and ca