The invention discloses a drilling machine for switching construction of a rotary drill bit and an impactor. The drilling machine adopts rotary drilling machine, a power head drive sleeve of the rotary drilling machine is in coaxial butt joint with a removable rotary joint, the outer ring of the rotary joint is arranged fixedly relative to the power head drive sleeve, the top of the inner ring ofthe rotary joint is connected with the power head drive sleeve in a transmission mode, and the bottom of the inner ring of the rotary joint is fixedly connected with coil pipe wheel assemblies of theimpactor. The inner ring and outer ring of the rotary joint are provided with a duct for rotating butt joint of compressed air and hydraulic oil. According to the drilling machine used for switching construction of the rotary drill bit and the impactor, the construction switch of the rotary drill bit and the impactor can be realized simultaneously by a drilling device, the switching process only requires the removal of drill bit components, and does not require the overall movement of the drilling machine, thus the drilling efficiency of pile foundation holes in face of complex geological structure is greatly improved.