Abstract: The idea of flexible manufacturing was introduced into additive/subtractive manufacturing, and the additive/subtractive flexible manufacturing process was formed. The connotation and processing range of the process were described, the process flow of additive/subtractive flexible manufacturing was established, the characteristics of each component process were discussed, and a variety of flexible processing methods in between the two processes of material deposition and material removal in additive/subtractive flexible manufacturing were emphatically expounded in detail.on this basis, The equipment structure and interrelation of the additive/subtractive flexible manufacturing system were established, and the general layout of the processing equipment was given.which lays a foundation forresearch of the process sequence planning and the detailed structure.