在借助CAM软件进行数控编程的过程中,刀具的选择和切削用量的确定是十分重要,它不仅对被加工零件的质量影响巨大,甚至可以决定着机床功效的发挥和安全生产的顺利进行。所以,在编制加工程序时,选择合理的刀具和切削用量,是编制高质量加工程序的前提。文章对数控机床加工时切削用量的合理选择进行了详细阐述, In the course of CNC programming with CAM software, it is very important to select the cutting tool and the amount of cutting. It not only affects the quality of the machined parts greatly, but also determines the efficiency of machine tools and the safe production. Therefore, the preparation of processing procedures, the choice of a reasonable amount of cutting tools and cutting, is the preparation of high-quality machining procedures on the premise. The paper elaborates the reasonable choice of the cutting amount when machining the CNC machine tool,