The development of science and technology, the rise of the world's advanced manufacturing technology, and the continuous maturity have put forward higher requirements for the processing technology of CNC milling machines. The use of ultra-high-speed cutting and ultra-precision processing technology has greatly affected the CNC system and servo of CNC milling machines. Performance, spindle drive, machine tool structure and other aspects have proposed higher performance indicators. In recent years, the domestic economy has developed rapidly, and the pressure of competition in various industries has gradually increased. In order to enhance their market competitiveness, companies have to start to reform and innovate technology, and strive to achieve reliable operation with minimal investment. , Powerful function, high-precision CNC milling machine. How to effectively improve processing efficiency, I believe this problem is the thinking direction of every processing enterprise. This article is an overview of CNC milling machines and a series of discussions on how to improve the processing efficiency of CNC milling machines. With the advancement of science and technology, various forms of high-tech have been widely used in various industries. In the manufacturing industry, CNC milling machines have become the main production representatives. In aviation, molds and other fields, it plays a huge role. effect. CNC milling machines are mainly used for machine tools for sawing various metal materials. How to extend the service life and improve the operation effect, daily work and maintenance are essential. Correct and reasonable running-in of the newly purchased CNC milling machine. The correct operation method can effectively extend the service life. "Running-in" refers to the natural wear of the saw teeth. After removing the tooth edge burrs, the saw blade enters the normal sawing state to avoid chipping, curling of the saw teeth, and sharp section changes of profiles, pipes, and special-shaped materials. Sawing is carried out in strict accordance with the sawing parameters of different materials provided by CNC milling machine manufacturers, which mainly include various data such as speed, feed, and saw band tension. Secondly, we must choose different parameters to adjust according to the material, the correct use of cutting fluid, the mixture can lubricate and cool the saw blade, and timely clean off the attachments on the saw teeth. It is necessary to strengthen the daily maintenance of the CNC milling machine, so as to regularly replace the mechanical oil and wear parts.