Simply supported beam lossless longitudinal movement construction device

The utility model discloses a simply supported beam lossless longitudinal movement construction device which comprises a bracket, a driving piece, a bottom plate and a sliding seat used for being installed on a pier top bearing platform, the end of the bottom plate is bent to form a folded edge used for being arranged on the side wall of a supported beam in a hooking mode, the bracket is connected to the bottom plate, an abutting face is formed on the bracket, and the driving piece is arranged on the sliding seat. The output end of the driving piece abuts against the abutting face, a containing space used for containing the supporting plate is formed between the driving piece and the pier top bearing platform, the sliding base is arranged at the end, close to the folded edge, of the bottom plate, and a rolling body is arranged between the sliding base and the bottom plate. The device is simple in structure, effectively losslessly moves the simply supported beam of the railway longitudinally, and has a good us