CNC lathe is a high-precision and high-efficiency machine tool. It undoubtedly plays an irreplaceable role in meeting the high requirements of modern industrial production. In the CNC lathe processing process, the choice of cutting tools directly affects the processing quality, processing efficiency and energy consumption, so the correct selection of cutting tools is crucial. This article will explain how to choose the right tool from the aspects of the form, material, edge shape and edge angle of CNC lathe tools, improve the efficiency and quality of CNC lathe processing, and reduce processing costs.