The utility model discloses an object lifting device for high-speed bridge widening construction in the technical field of high-speed bridge widening construction, which comprises a widening beam body, a support frame body and a walking device, the two ends, away from the first sliding device, of the top of the supporting frame body are fixedly connected with a first guiding device and a second guiding device correspondingly. The lifting device is simple in structure, and meanwhile construction materials can be directly lifted to a construction working face from the ground between a new bridge and an old bridge. The distance of the lifting hook can be adjusted through the sliding device, the lifting hook can adapt to objects of different sizes, meanwhile, the arranged walking device enables the lifting hook to freely walk, and the lifting hook can be conveniently used on different working faces.