With the continuous development of science and technology, CNC technology has been widely used in all walks of life, especially in the field of machining. Through the application of numerical control technology, the accuracy of machining is effectively improved, and the overall quality and efficiency of machining are effectively improved. It also provides a new direction for the future development of the mechanical processing field, and promotes the development of the mechanical processing field towards automation, refinement and intelligence. Based on this, this paper mainly studies the practical application of numerical control technology in machining machine tools, and puts forward the future development prospects of numerical control technology according to its situation, so as to provide a reference for the future development of mechanical processing.