The jib is a hexagonal section box-type structure with steel plate welded, and the jib is a straight arm, and a total of one arm is the main steel structure part of the crane, which is made of a special grade steel plate for super toughness steel structure, which is combined with a bracket to support JIB and oil cylinders. The Jib of the bearing support Crane is called the self-lubricating casing, and the bearings for the oil cylinders are spherical. The tower contains all the required requirements: for the reinforcement of the rotary drive and the hydraulic parts. The bottom of the tower comprises a flange and a slewing ring. The crane tower is welded by the steel plate, and the tower is hinged with the main arm.