Rotary drilling rig with good-stability fixing device

The invention relates to the technical field of rotary drilling rigs, and particularly relates to a rotary drilling rig with a good-stability fixing device. The rotary drilling rig with the good-stability fixing device comprises a bottom plate and a cab, wherein the base is fixed to the side, away from the cab, of the top face of the bottom plate, an installation groove is formed in the front endof the base, third clamping grooves are formed in the vertical walls of the two sides of the installation groove, rotating shafts are connected to the third clamping grooves in a clamped mode throughsprings, an installing base is fixed to the tops of the rotating shafts through supporting columns, a guide sliding column is fixed to the front part of the top face of the installing base, a first clamping groove is formed in the vertical face of the front end of the guide sliding column and fixedly connected with a drilling rig rod through a clamping plate, connecting rods are fixed to the vertical faces of the two sides