In response to the development trend of information, networking, and systematization in avionics system, and to address the lack of cross platform system interaction requirement transfer and customized system architecture design method in the field of avionics, this article proposes a model-based avionics system architecture framework. Taking the SoS capability, task activities, and functional service analysis results from the SoS architecture modeling and design stage as inputs, the article designs running application, data link, application, service, network, access, resource, and other hierarchical viewpoint models of avionics system architecture and their interdependence and interaction relationships, providing a top-level configuration foundation for detailed design and integration verification of avionics system architecture. At the same time, it accumulates avionics system design information, which can more efficiently support the reuse design and upgrade optimization research of advanced avionics systems.