Folding lifting appliance for boxcar

The utility model relates to the technical field of lifting devices, and provides a folding lifting appliance of a boxcar, which comprises a travelling crane rail and a lifting device, the lifting device moves along the travelling crane rail through a sliding plate, the lifting device comprises a lifting mechanism and a clamping mechanism, and two ends of the lifting mechanism are respectively connected with the sliding plate and the clamping mechanism. The lifting mechanism comprises a fixing frame, an electric hoist and two lifting shear shank sets, the fixing frame is fixedly arranged on the sliding plate, one end of each lifting shear shank set is hinged to the fixing frame, the other ends of the two lifting shear shank sets are connected with a connecting frame, a guide rod is arranged on the connecting frame, and the guide rod and the lifting shear shank sets are arranged in a coplanar mode. The distance between the guide rods is equal to the width of the carriage, one end of each guide rod is connected