Abstract: A high-efficiency, mass-produced micro-turbine numerical control processing technology and a process scheme for improving metal removal rate is proposed. Taking the micro two-stage axial-type turbine air motor as the research object, the machining route of clamping the nozzle rotor is developed, and the metal removal rates of the turbine with the expandable surface when using the rounded end mill and the ball end mill are compared by the quantitative calculation method. In the three processes of rough milling blade passage, finish milling blade and finish milling wheel hub, the metal removal rate of the rounded end mill is 2.96 times, 10 times and 2 times higher, than the ball end mill, respectively. The results tested by a special platform show that when the compressed air inlet pressure is 0.3 MPa, the designed maximum speed of 100 000 r/min is satisfied, which verifies that the numerical control machining process is feasible. Besides, the side edge machining of the blade using the cylindrical milling cutter is efficient to improve the metal removal rate. It also lays a foundation for the mass production of the micro two-stage axial-type turbine air motor.