In the field of 3C electronics, CNC machining gives products exquisite appearance and excellent performance. Taking mobile phones as an example, the surface roughness of the aluminum alloy shell after processing can reach Ra0.4μm, achieving a delicate touch and exquisite appearance. The molding accuracy of the internal tiny electronic components can reach ±0.02mm, which meets the development needs of miniaturization and high performance of 3C electronic products, so that the equipment has strong computing and stable operation ability while being thin and portable.