Abstract: The development of science and technology has promoted the development and application of automation technology. At present, the application of automation technology in the field of my country's mechanical design and manufacturing is still in its infancy, which has a certain gap compared with developed countries. Application of automation technology can not only realize integrated and intelligent development, but also enhance the core competitiveness of an enterprise, thereby laying a solid foundation for its long-term development. this article introduces the basic connotation of automation technology, analyzes the significance and value of the application of automation technology in current mechanical design and manufacturing, and discusses its specific application methods for practical reference.