The utility model relates to the field of electric power facilities, and particularly discloses a drilling machine. The drilling machine comprises a power car and a chassis, wherein the chassis is hinged with a drilling rack and a hydraulic cylinder; an output end of the hydraulic cylinder is hinged on the drilling rack; the drilling rack is composed of two sliding grooves; the upper ends and the lower ends of the two sliding grooves are respectively connected together; the top end of the drilling rack is provided with a first hydraulic motor; a transmission chain is wound between an output end of the first hydraulic motor and the lower end of the drilling rack; the transmission chain is provided with a slider; the two ends of the slider are located in the sliding grooves; the slider is provided with a second hydraulic motor; an output end of the second hydraulic motor is connected with a drilling screw conveyor; the drilling screw conveyer is parallel to the sliding grooves. The drilling machine disclosed by the utility model is simple in structure, convenient to operate, fast in drilling speed, high in efficiency, and small in floor space during drilling; besides, since the drilling rack and the drilling screw conveyor can rotate along with a turntable, thus the drilling machine can be adapted to the drilling work of different special positions.