Anti-collision device for building engineering transformation

The anti-collision device comprises a box body, the upper end face of the box body is open, a plurality of buffer plates are horizontally and slidably connected to the side wall of the box body through a guide mechanism, a plurality of containing grooves are symmetrically and vertically formed in the upper end face of the box body, a protection plate is vertically and slidably connected into each containing groove, and the upper end face of the box body is open. A vertical groove is vertically formed in the lower end face of each protection plate, a first piston plate is vertically connected into each vertical groove in a sealed and sliding mode, and a plurality of horizontal grooves right opposite to the side walls of the buffer plates are horizontally formed in the lower side of the side wall of the box body. By arranging the rubber pad, the buffer spring and the hydraulic oil, collision borne by the box body can be buffered for multiple times, the protection plate in the containing groove can be lifted thr