Rotary drilling rig

The invention discloses a rotary drilling rig which comprises a walking crawler belt, a bottom frame, at least two swing arms, a driving device and a driving device. One end of each supporting leg is connected to the bottom frame, and the other end is connected to the corresponding walking track; the drilling machine device is mounted on the upper surface of the bottom frame, and the drilling machine device comprises a drill rod assembly; a drilling bucket is arranged at the lower end of the drilling rod assembly, the swing arm can swing in a plane perpendicular to the lifting direction of the drilling rod assembly, a vibrator is installed at the end of the swing arm, and the swing arm can be arranged in a relative opening and closing mode so as to clamp or loosen the drilling bucket. In the using process of the rotary drilling rig, the drilling bucket can be clamped through the vibrator for deslagging, noise pollution in the deslagging process is reduced, the drill rod is prevented from being impacted in the