Additional connecting device of road traffic safety facility construction anti-collision guardrail

The utility model relates to the technical field of building construction equipment, and provides a road traffic safety facility construction anti-collision guardrail adding device which comprises a first guardrail, a connecting device is movably connected to the center of the right side of the first guardrail, first connecting pieces are fixedly installed at the left ends of the two sides of the connecting device, and second connecting pieces are fixedly installed at the right ends of the first connecting pieces. First screw rods are movably embedded in the two sides of the two first connecting pieces, the outer surfaces of the left sides of the four first screw rods are in threaded connection to the right side of the first guardrail, and a sliding groove is formed in the center of the left side in the connecting device; sliding blocks are slidably connected to the two sides of the inner surface of the sliding groove and located in the connecting device, first limiting blocks are fixedly installed on the opp