The utility model provides a road guardrail, includes two bases, the side's of being equipped with pipe on the base, be equipped with the shaft hole on the pipe wall of square pipe, be equipped with the axostylus axostyle in the shaft hole, the one end and the square intraductal gear?connection of axostylus axostyle, the other end and the knob of axostylus axostyle are connected, the square intraductal support arm that is equipped with, the front surface of support arm is equipped with the rack with gear engagement, the vertical spout that is equipped with in support arm one side, be equipped with a plurality of sliders in the spout, slider one side is equipped with the blind hole, the slider opposite side is equipped with the horizontal pole, the opposite side slider is connected to the horizontal pole, is equipped with many crossbeams between two square pipes. The opposite side of support arm is equipped with a plurality of through -holes, be equipped with the pin in the through -hole, pin one end is established in the blind hole of slider one side. The utility model discloses except the vehicle that can travel the subtend, non -motor separate, can also rise, avoid the pedestrian to stride across, cause the injury.