Abstract : Machining centers are a product of the further development of CNC technology and are the basic unit of flexible production in modern workshops. They not only require high production efficiency, but also need to improve the machining accuracy of parts. After briefly analyzing the development of high-speed machining technology, Fengqiu discusses two key technologies of ultra-high-speed machining centers: "high-speed electric spindle" and "linear motor high-speed feed unit", and introduces the application and development prospects of high-speed machining technology. Keywords : high-speed machining; machining center; electric spindle; linear motor 1 Introduction Machining centers are a product of the further development of CNC technology. The main differences between them and ordinary CNC machine tools are: (1) multi-process function, with a rotary table, which can complete almost all multi-face machining processes except for the base surface in one clamping; (2) an automatic tool changer (including tool magazine and tool changing robot), which realizes rapid automatic tool changing between processes; (3) adopts full digital control of three coordinates or above, and uses an economical CNC system; (4) often has an automatically changing double worktable to realize the automation of loading and unloading. Compared to ordinary NC machine tools, machining centers significantly shorten the "auxiliary time" for machining parts, unprecedentedly improve the continuity of the production process, and achieve unprecedented levels of technological possibilities and machining accuracy. Machining centers have become the basic flexible production unit in modern workshops. However, relying solely on flexible automation to compress "auxiliary time" is far from sufficient. Low-speed CNC technology is not the only advanced manufacturing technology. To further improve the production efficiency of machining centers, it is necessary to drastically increase the cutting speed and feed rate of parts to significantly reduce the "cutting time." High-speed machining technology emerged in this historical context after overcoming numerous technical challenges. It has flourished since the 1990s and is now widely used in industrialized countries, achieving remarkable technical and economic benefits. The high-speed development of machining centers has become an irresistible historical trend in modern manufacturing technology development and a priority high-tech development area for my country in the 21st century. [b][align=center]For more details, please click: High-Speed ​​Machining Centers and Their Applications[/align][/b]