Guardrail for road

The utility model relates to the technical field of guardrails, and discloses a highway guardrail which comprises a mounting plate, a mounting groove with openings in the two sides is formed in the top of the mounting plate, a corrugated plate is slidably connected into the mounting groove, two fixing grooves are formed in the inner wall of the bottom of the mounting groove, and two fixing plates are fixedly connected to the bottom end of the corrugated plate. The bottom ends of the two fixing plates extend into the corresponding fixing grooves correspondingly and are slidably connected with the corresponding fixing grooves, sliding grooves are formed in the inner walls of the sides, close to each other, of the two fixing grooves correspondingly, sliding plates are slidably connected into the two sliding grooves correspondingly, and first clamping grooves are formed in the sides, close to each other, of the two fixing plates correspondingly. The corrugated plate can be quickly and conveniently mounted on the