CNC Machining with Colorful Anodizing technology is widely used in various fields, not only is the mobile phone, computer and electronic products, also used in machinery parts, auto parts, Precision Machined Parts and aircraft radio equipment, daily necessities and architectural decoration etc. Different aspects of the application of anodic oxidation process is also different. Among them, the anode aluminum oxide, such as what used in iPhone mobile phones, belongs to the high-precision and difficult metal surface treatment technology, so iPhone mobile phones are so powerful, but also benefited from the development of metal surface treatment technology.