Quick lifting appliance for concrete prefabricated box girder

The invention relates to the technical field of hoisting slings, and provides a concrete prefabricated box girder rapid hoisting sling which comprises a fixed shell, a first threaded rod, a first motor, a hoisting mechanism and a bottom supporting mechanism, the first threaded rod is rotationally installed in the fixed shell, the first motor is fixedly installed on the fixed shell, and the first motor is fixedly installed on the bottom supporting mechanism; the output end of the first motor penetrates through the fixing shell to be connected with the first threaded rod, the two lifting mechanisms are arranged on the first threaded rod, the four bottom supporting mechanisms are arranged on the lifting mechanisms, the prefabricated box girder is fixed through the lifting mechanisms, and the bottom supporting mechanisms are arranged on the lifting mechanisms. According to the technical scheme, the problems that in the lifting process in the prior art, due to the fact that a rope is abraded and broken, the prefab