Large prefabricated box girder top plate hoisting anti-cracking device and anti-cracking method thereof

According to the large prefabricated box girder hoisting anti-cracking device and the anti-cracking method thereof, hoisting holes are formed in the two sides of a prefabricated box girder and used for hoisting the prefabricated box girder, and in the hoisting process, horizontal fine cracks are likely to be generated at the joints of the top face and the bottom face of the box girder used for forming the hoisting holes, and the quality of the prefabricated box girder is affected. The hoisting anti-cracking device is detachably installed on the pure top plate side of the prefabricated box girder, through the arrangement of the hoisting anti-cracking device, the connecting strength of the connecting position of the top face of the box girder and the bottom face of the box girder is enhanced, the overall stress of the prefabricated box girder is more uniform, cracks are prevented from being generated on the prefabricated box girder in the hoisting process, and the quality of the prefabricated box girder is guar