This standard is proposed by the Institute of Mechanical Standardization of the Ministry of Mechatronics Industry. It stipulates the classification principles, code structure, and the division of large and medium categories of process methods for mechanical manufacturing process methods. This standard is applicable to computer-aided process management and process design in the machinery manufacturing industry. It aims to provide a unified standard for the classification and coding of related processes. The code of this standard is not applicable to the marking of drawings, but is mainly used for classification coding in the process management system.