The suitable digital architecture of airborne system has many benefits, such as light weight, low cost, fast upgrade and easy expansion. In view of the problems of the traditional digital architecture of airborne systems, such as diversification, high adjustment cost caused by changes in requirements, and weak expansibility of functions/interfaces/communications, the design concept of digital architecture of intelligent vehicles was introduced to explore the development direction of aviation applications. Firstly, this paper studies the status quo of automobile digital architecture at home and abroad, and analyzes the design consensus of digital architecture. Then, the electronic and electrical architecture of multi-domain access and the layered decoupled service-oriented software architecture are analyzed. Finally, according to the application background and development status of aviation field, the design method of EE architecture, service-oriented software architecture, and adaptive aerial download and other key technologies are systematically given, which provides technical support for aviation model design.