Pavement flatness detection device

The utility model discloses a road surface flatness detection device, which comprises a detection main body and a cleaning assembly, moving wheels are arranged at the bottom of the detection main body, an anti-collision protection assembly is arranged on the outer surface of the detection main body, and the cleaning assembly for road surface cleaning is arranged above the lower surface of the detection main body. According to the road surface flatness detection device, a plurality of assemblies are arranged in a matched mode, the road surface is cleaned through the rotating cleaning brush, so that sundries on the road surface to be detected are reduced, the detection precision is improved, collision to equipment is reduced through the anti-collision assembly in the equipment movement process, the service life of the equipment is prolonged, and the detection efficiency is improved. The optical sensor is in contact with the detection plate, the detection roller is always in contact with the pavement under the a