The invention relates to a numerical control machine tool machining technology, and particularly relates to a high-precision numerical control machine tool machining all-in-one machine. The high-precision numerical control machine tool machining all-in-one machine is used for solving the problems that the finish degree and precision are insufficient during turning and milling combined machining, manual operation is needed for discharging, and automatic production cannot be achieved. According to the high-precision numerical control machine tool machining all-in-one machine, the machining state of a turning tool and a milling tool on a workpiece is controlled through three combined shafts, the contact state of the turning tool and the workpiece and the contact state of the milling tool and the workpiece are controlled through a high-precision hydraulic cylinder, the radial footage depth is controlled through the high-precision hydraulic cylinder, the axial footage of the turning tool is controlled through a high-precision lead screw, and the axial footage of the milling tool is controlled in the manner that a servo motor controls an eccentric wheel to rotate on the basis of the lead screw. When the workpiece and the turning and milling tool are separated, the front workpiece can be jacked into a discharging sliding groove along with jacking of the rear workpiece, and therefore automatic discharging is achieved, manual operation is not needed, and the problems that the finish degree and precision are insufficient during turning and milling combined machining, manual operation is needed for discharging, and automatic production cannot be achieved are solved.