In recent years, high-speed cutting processing technology has been rapidly developed in my country's machining. High-speed cutting has been paid more and more attention by CNC machining personnel due to its remarkable advantages. Some people mistakenly believe that high-speed cutting can only be achieved on machining centers. The author of this article explains the basic principles of high-speed cutting and introduces examples to illustrate that high-speed cutting can not only be used on machining centers, but also can be used for ordinary CNC The milling machine can also achieve the purpose of improving processing efficiency, reducing cutting stress and improving the quality of the processed surface.