Segment connecting structure of rotary drilling rig drilling rod

The utility model relates to a segment connecting structure of a rotary drilling rig drilling rod. The segment connecting structure of the rotary drilling rig drilling rod comprises drilling rods, core rods and a driving pipe, wherein an inner key along the length direction is arranged inside each driving rod segment, the drilling rods and the core rods are provided with strip-shaped outer keys with the length same as that of the drilling rod along the length direction, a plurality of bearing positions are arranged on the outer side of each drilling rod segment, the drilling rod is divided into a plurality of segments according to each bearing position of each drilling rod segment, and every two drilling rod segments are connected by a joint structure. The drilling rod is divided into a plurality of segments according to each bearing position, every two drilling rod segments are connected through the joint structure, the drilling rod is even during stressing, the coaxial degree and the linear degree of the drilling rod are guaranteed, the anti-bending and anti-torque roles during stress are achieved, the fatigue degree of the drilling rod during use is reduced, and the segment connecting structure of the rotary drilling rig drilling rod is helpful to section of steel pipes.