Numerical control machining center is a kind of numerical control machine tool, which can automatically change the cutter and can be operated in a certain range. Machining parts through a clamping, the CNC system can control machine according to different process automatic selection and replacement of cutting tools; automatic change of the machine tool spindle speed, feed rate and tool relative workpiece trajectory and other auxiliary functions, and continuously on the surface of the workpiece processing automatically drilling, countersinking, reaming, boring, tapping thread milling and other machining.