CNC machining process procedure with traditional machining that is consistent overall, but has also undergone a significant change. Digital information control parts and machining tool displacement method. It is to solve the ever-changing variety of parts, small batch, complex shapes and high precision problems and achieve efficient and effective way to automated processing. CNC machining is the processing of CNC machining tools. CNC machine is controlled by CNC machining programming language, usually G code. As well as tools converter cooling agent functionality etc. CNC machining has great advantages to compare with manual process, such as CNC machining parts produced very accurate and repeatable; CNC lathe and EDM wire cutting are also assistant to complete the machining parts. The material is the same as the final product .Both of property and function are far exceeding SLA prototype.