Highway bridge anti-collision device

The utility model discloses a highway bridge anti-collision device. Crash barrier comprising a crash barrier body, the anti-collision body is of a cylindrical structure composed of a plurality of anti-collision units which are detachably connected. Each anti-collision unit is of an arc-shaped plate-shaped structure, the heads and the tails of the adjacent anti-collision units are connected throughdovetail groove tenon structures, a cavity is formed in each anti-collision unit, a plurality of buffer structures are arranged in each cavity, an inner protective barrel is arranged in the anti-collision body, and a plurality of air bags are evenly distributed between each inner protective barrel and the anti-collision body. The anti-collision unit is convenient to disassemble and assemble, andtime and labor are saved; the compression springs and the rubber structures are uniformly distributed at intervals, so that the buffering effect of the anti-collision unit can be effectively enhanced;a plurality of air bags ar