AbstractFor the characteristics of the nc machine tool and advantages into play, people need a higher production efficiency, easy automation, products increasingly update at the same time, to do better meet the customer requirements must be precision, to improve competitiveness, increase enterprise Play a CNC machine with, in addition to master CNC technology, the performance of nc machine tools, the characteristics of understanding, should also be before process analysis and determine the process technology, to ensure foolproof processing Based method to study the processing technology of the nc machining process, such as: parts diagram analysis, processing route and formulate, cutting tool selection, selection of cutting parameter, processing process, As a result, in the scheme of machining process design and analysis of key design and calculation, Conclusion on CNC milling machine processing process, design rules, determine the feeding line, order processing, the processing plan implementation, process design, the key analysis, Most of them have used theory and professional knowledge, but through this paper summarizes the Key words: numerical control technology; Machining center; Turning center; Cutting tool; Part