Road surface inspection device

The utility model discloses a road surface inspection device which comprises a test vehicle, an eight-wheel flatness instrument and a support assembly, the support assembly comprises an installation box used for accommodating the eight-wheel flatness instrument, the installation box is installed at the top of the test vehicle through a damping mechanism, installation lugs are formed at two corners of one side of the installation box, pull rods are installed on the installation lugs in a sliding mode, and the pull rods are connected with the test vehicle. One end of the pull rod is sleeved with a spring, and the other end of the pull rod is rotationally provided with a pressing block, so that the pressing block abuts against the hinge of the eight-wheel flatness instrument top cover, and limiting of the eight-wheel flatness instrument top cover is completed. The eight-wheel flatness instrument is installed in the installation box and is protected by the shock absorber in a shockproof mode, the service life of