The invention discloses a vehicle height-limit blocking system. The system comprises a blocking cable and fixed piles mounted on both sides of a road; the blocking cable is connected between the fixed piles on both sides to block the vehicle; the system further comprises a pulley block and a damping system; the pulley block comprises a first pulley, a second pulley and a diverting pulley, wherein the first pulley, the second pulley and the diverting pulley are all mounted on the upper and lower ends of the fixed piles; the blocking cable passes through the first pulley, the diverting pulley and the second pulley sequentially, and after the tail end of the blocking cable finally passing through the second pulley, the tail end of the blocking cable is connected with the damping system; the damping system comprises a damping cable and a fastening member; the damping cable is provided with at least one ferrule; the ferrule junction is pressed tight by the fastening member; the tail end of the blocking cable is connected with the damping cable. The system has the advantages of being capable of improving the protective effect, avoiding damage to buildings by vehicles, and being convenient and quick in maintenance.