Horizontal azimuth angle adjusting device of crawler-type drilling machine

A horizontal azimuth angle adjusting device of a crawler-type drilling machine comprises a rotating device fixedly connected with a base table, the rotating device is connected with a drilling rod support, a base is arranged in the rotating device, an arc-shaped groove and a square groove are formed in the rotating device, the square groove is deeper than the arc-shaped groove, a driving motor is arranged on one side of the rotating device, and a disc is arranged on the output shaft face of the driving motor. A fan-shaped sliding block and a cylindrical sliding block are fixed to the disc and correspond to the arc-shaped groove and the square groove, a penetrating column which penetrates through the upper end face of the rotating device and is connected with the drill rod support is arranged in the middle of the base, the driving motor drives the sliding blocks to rotate, and horizontal angle adjustment of the drill rod support is achieved through the penetrating column. And the requirement of the drilling in