Large aircraft assembly has such typical characters as multi-discipline

high precision

complex coordinate supplier chain

heavy workload

etc. It takes the definitive role during the aircraft deliver cycle

quality and cost control. Currently

most domestic aircraft manufacturers have adopted model-based definition and assembly simulation technologies

but the business is still keeping the traditional design and manufacturing separated mode. The advanced digital assembly engineering application system is not built. This article analyses the digital assembly adoption status in avia-tion industry

proposes the integrated architecture of combing advanced business management

digital manufacturing engineering design and assembly simulation validation. Then key technologies are demonstrated. Based on the architecture

constructs the engineering application integration environment of assembly plan and simulation combined with advanced management approaches. Final the application benefits of one large aircraft program are described.