In order to improve the machining efficiency and reduce the manufacturing cost of line-contact curvilinear cylindrical gears,a new method was proposed to solve the machining problem of line-contact curvilinear cylindrical gears by using the existing six-axis CNC gear milling machine and single edge face milling cutter.According to the forming principle of the gear,the mathematical model of the tooth surface was derived,the point cloud data of the tooth surface were obtained;the solid model of the gear was built in a 3D modeling software based on the point cloud data;a CNC gear milling machine and tools models were constructed in VERICUT software,and the CNC program for gear processing was written to complete the gear simulation processing;the constructed gear solid model and the simulated gear model were used to analyze the processing deviation.The results show that it is feasible to process the line-contact curvilinear cylindrical gears using the proposed method,by which the investment in the research of special line-contact curvilinear gear machine tools can be reduced.