Highly anti-torque drill rod

The invention relates to a highly anti-torque drill rod which is characterized by comprising a drill rod body (1), wherein an external thread (2) is arranged on the periphery of a pin small end of the drill rod body (1); an internal thread (3) is arranged on the inner wall of a box big end of the drill rod body (1); the external threads (2) and the internal threads (3) of two adjacent drill rods are meshed so as to connect the two drill rods; step surfaces are arranged at the upper and lower ends of the external thread (2) and the upper and lower ends of the internal thread (3) of the drill rod body (1); the steps at the lower end of the external thread (2) and the lower end of the internal thread (3) are main shoulders (4); and the steps at the upper end of the external thread (2) and the upper end of the internal thread (3) are auxiliary shoulders (5). The highly anti-torque drill rod provided by the invention can guarantee accurate realization of interference fit between the main shoulders and the thread section; the auxiliary shoulders also bear some load in a working state and realize certain overload protection effect; and moreover, the anti-torque intensity of the drill rod can be improved, and the safety of the drill rod is guaranteed.