The invention discloses a tubular drilling tool, which comprises connecting parts, a tube body and a cutting tool which are arranged in sequence from top to bottom. The cylindrical drilling tool also comprises a centering part, which is fixedly arranged outside the upper end part of the tube body, and the revolution external diameter of the centering part is identical with the aperture of a pile hole. Preferably, the centering part comprises a centering sleeve and a plurality of connecting parts; the centering sleeve is nested outside the upper end of the tube body; the plurality of connecting parts are respectively and fixedly arranged between the centering sleeve and the tube body. The centering part arranged at the upper end part of the tube body pushed against with the inner wall of the pile hole is adopted in the cylindrical drilling tool to guarantee the centering of the tube drill, and the diameter of the tube drill can be designed into a smaller size. The deep drilling resistance during the graded drilling construction process can be reduced, thereby enhancing the hole forming efficiency; in addition, the defects of pressure and torque insufficiencies can be made up. The tubular drilling tool provided by the invention can be used for rotary drilling rigs or other pile work machinery and especially used for the graded drilling process on hard formation under the condition that the pressure of the drilling rig is insufficient.