Aiming at the problem that a large number of non-instantiated standard parts in aircraft product have not yet achieved consumable process design, the idea of two-level splitting and consumable allocation of non-instantiated standard parts according to assembly requirements is proposed. Combined with the business structure process, the secondary development of CATIA CAA was used to carry out the position-level split of the non-instantiated standard parts R model, and their consumable allocation and management technology of non-instantiated standard parts in the assembly process design process were systematically studied. System testing and application verification have been carried out on the some products, AO creation has been completed, the consumable assembly process design of all participating parts has been realized, the consistency and accuracy of manufacturing data and engineering data have been ensured, and good application results have been achieved.