Multi -purpose road bridge is under construction terracedly

The utility model discloses a multi -purpose road bridge is under construction terracedly, comprising a support, first accent knothole, first draw -in groove, first round pin axle, first mobile jib, the stiffening rib, second round pin axle, the second draw -in groove, first horizontal pole, the second horizontal pole, knothole is transferred to the second, third round pin axle, the cat ladder, the second mobile jib, the bilateral symmetry is equipped with first draw -in groove around the upper surface of support, the both sides of draw -in groove are equipped with first accent knothole, the both ends of support are connected with the lower extreme of first mobile jib and second mobile jib respectively through first round pin axle, the tip setting of first round pin axle is in first accent knothole, be equipped with the second draw -in groove on the medial surface of first mobile jib, the upper portion of first mobile jib is passed through second round pin axle and is connected with the one end of first horiz