Guardrail for road construction

The utility model discloses a guardrail for road construction, which comprises stand columns, two fixing rods are arranged between the two stand columns, the two fixing rods are hinged with each other, a groove is arranged inside each fixing rod, a first sliding block is connected inside each groove in a sliding mode, and a connecting rod is fixedly installed on one side of each first sliding block. The pull rod is pulled outwards, the pull rod drives the second sliding block to compress the spring, the clamping block is separated from the clamping groove formed in the surface of the connecting rod, then the pull rod is rotated by a certain angle, the end of the pull rod is located on the upper side of the limiting groove, after the pull rod is loosened, the pull rod is clamped in the limiting groove, the clamping block is prevented from resetting, and meanwhile the stand column is pulled outwards; at the moment, the connecting rod slides along the fixing rod, the connecting base slides along the sliding groo