The utility model discloses a grow up device of oversize vehicle tune in the tunnel, include traction force device, base plate frame, roof and arrange respectively the cushion that has a slope of roof both sides, a vertical pivot is installed through the bearing in base plate frame's center, and base plate frame's top surface has laid the supporting steel plate, and the roof is fixed with vertical pivot, and the bottom surface of roof is fixed with a plurality of universal wheels, universal wheel and supporting steel plate contact, the last face bonding of roof has the multichannel spiral, the periphery of roof is equipped with a plurality of screw rods, rotates the lift that the roof was realized to the screw rod, the traction force device sets up in base plate frame, and the traction force device includes motor, hoist engine and derailleur, and the winding has wire rope on the hoist engine, and wire rope's the other end is fixed in vertical pivot, start the hoist engine and pass through the vertical pivot of wire rope drive rotation, and then drive the roof rotation. The utility model discloses can realize the oversize vehicle in the tunnel of growing up at a slow speed, steady tune, its easy operation, safe laborsaving.