The invention discloses a novel 3D printing and cutting machine for high-power steel structure, which includes a body, the upper surface of the body is provided with a motor, the lower surface of the motor is connected with the upper surface of the body, and the outer wall of the motor is installed with The first runner, the inner wall of the first runner is connected with the outer wall of the motor, the outer wall of the right side of the body is equipped with a cabinet, the lower surface of the cabinet is connected with the upper surface of the body, the outer wall of the left side of the body Brackets are installed. This new type of cutting machine for high-power steel structures adjusts the processing speed of the cutting piece to the workpiece through the cooperation between the motor, the first runner, the belt and the second runner, and under the action of the rotating shaft and the rotating rod, preventing machining. When the thickness of the workpiece is large, the speed of the motor can be adjusted to increase the speed of the motor, increase the cutting speed, and improve the processing efficiency, thus overcoming the shortcomings of the traditional steel structure cutting machine, which has poor processing accuracy and cannot adjust the cutting speed. The processing efficiency is improved and the processing cycle is saved.