Special car height detecting device

The utility model discloses a special car height detecting device. The special car height detecting device comprises a measuring plate, a measuring plate pull rope, a first pulley, a second pulley, a cross beam and a supporting frame installed on two ends of the cross beam and used for supporting the cross beam. The first pulley is installed on the center of the lower surface of the cross beam. The second pulley is installed on the connection part between the cross beam and the supporting frame. The measuring plate pull rope is installed on the first pulley and the second pulley. A fixed end of the measuring plate pull rope is connected with the upper surface of the measuring plate. A movable end of the measuring plate pull rope is arranged on the side edge of the supporting frame. According to the utility model, the first pulley and the second pulley are arranged, the measuring plate pull rope is convenient for a worker to pull, and by measuring the length between two signs on the measuring plate pull rope, the height of a special car can be obtained. The special car height detecting device provided by the utility model is not affected by whether the cross beam is bent when measuring the height of the special car, so that the special car height detecting device is capable of improving accuracy of special car height detection.