With the continuous development of the automotive industry,the application of CNC technology in automotive parts processing is becoming increasingly widespread.Utilizing CNC technology to achieve automa-tion and intelligence in automotive parts processing is the key for automotive enterprises to achieve and maintain competitive advantages.This article starts with the key technologies in CNC machining technology:CNC pro-gramming technology,CNC machining quality control technology,tool path planning,data transmission and communication technology in CNC machining,analyzes the specific applications of CNC technology in complex geometric shape parts processing,high-precision parts processing,and batch production,and looks forward to the future development trends of CNC technology.