The invention belongs to the technical field of drilling machines, and particularly relates to a drilling machine based on compressor automatic speed regulation and used for indoor decoration. The drilling machine comprises a variable speed cone mechanism, a compressor, a condenser, an evaporator and a fixing device; the variable speed cone mechanism, the compressor, the condenser and the evaporator are installed in the fixing device; and the drilling machine has the functions of automatically decreasing the temperature, automatically regulating speed, reducing noise and achieving continuous work. The variable speed cone mechanism in the drilling machine has the function of adjusting the drill bit speed; the compressor has the function of compressing liquid working media into the evaporator; the evaporator has the function of keeping the motor temperature at a certain value; the condenser has the effect that gaseous state media flowing from the evaporator become liquid state media, and then the liquid state media is conveyed into the compressor; the fixing device has the effect of fixing the variable speed cone mechanism, the compressor, the condenser and the evaporator; a pipe connecting device has the effect of connecting an evaporation structure with the compressor, and the compressed high-pressure liquid state media are conveyed into the evaporation structure.