Guardrail for road and bridge construction

The guardrail for road and bridge construction comprises a supporting base, a storage main box and a folding rotating rod, the storage main box is fixedly connected to the top of the supporting base,a shaking grab handle is arranged on the inner top wall of the storage main box through a notch, and the folding rotating rod is fixedly connected to the bottom of the shaking grab handle. The utilitymodel discloses a guardrail for road and bridge construction. A silencing rectangular plate and an extension support plate are arranged; the extension support plate is translated and adjusted by virtue of a rotating wheel; therefore, the external isolation and protection effects of the plurality of silencing rectangular plates are achieved; the adsorption and noise reduction effects can be achieved on the construction noise; a rocking grab handle and a folding rotating rod are arranged; and the handle is shaken to circularly rotate the folding rotating rod, so that the plurality of silencingrectangular plates can be c