Rotary drilling rig with fixing device with good stability

The utility model relates to the technical field of rotary drilling rigs, and discloses a rotary drilling rig with a fixing device with good stability, which comprises a mounting seat, a top plate isfixedly mounted at the bottom of the mounting seat, and a first damping spring is fixedly mounted at the bottom of the top plate. The rotary drilling rig with the fixing device with good stability isprovided; top plate, large pressure can be generated in the working process of the rotary drilling rig; the pressure can be borne by a base of the rotary drilling rig; first damping springs and seconddamping springs are arranged at the bottom of a top plate and the top of a bottom plate; when pressure comes to the base, the top plate is pressed downwards firstly, the main rod is pressed downwardsat the moment, the second damping springs are moved and pressed downwards between the supporting rods, the first damping springs and the second damping springs reduce impact force brought by the pressure step by step, and there