The utility model discloses a tower crane. The tower crane comprises a rotary tower body, a craning arm cantilever crane, a tower top and a balance arm cantilever crane, wherein the length of the craning arm cantilever crane is 60m and the height of the tower top is 6.33m; each U-shaped groove is internally and fixedly provided with an inclined plane supporting plate; one side edge of each inclined plane supporting plate is fixedly connected with the side wall of each U-shaped groove and the other side edge of each inclined plane supporting plate is fixedly connected with a bracket. The tower crane has the advantages that (1) the length of the craning arm cantilever crane is lengthened in a safe range so that the movable radius of the tower crane is increased and the working efficiency of the tower crane is improved; (2) the height of the tower top is reduced and the tensile strength and the bending strength are increased; meanwhile, the self gravity of the whole machine is lightened, materials are saved and the manufacturing cost is reduced; (3) a balance gravity structure is changed so that the tower crane is stable in the working process and the safety of operating the tower crane is improved.