Milling is fixing the blank, and using a high-speed rotating milling cutter to move on the blank to cut out the required shapes and features. Conventional milling is used more for simple shapes/features such as contours and slots. CNC milling machines can process complex shapes and features. The milling and boring machining center can perform three-axis or multi-axis milling and boring processing for machining, molds, inspection tools, tire tools, thin-walled complex surfaces, prostheses, blades, etc. When selecting CNC milling processing content, the advantages and key roles of CNC milling machines should be fully utilized.