With the development of Industrial 4.0 technology, digital twin technology is constantly penetrating into all fields of industrial production and new product development, and is bringing advantages such as overall optimization of comprehensive performance, reduction of R&D cost and shortening of R&D cycle for new product development. It is an important means to enhance the market competitiveness of new products. In the process of modern civil aircraft research and development, digital twin technology could be used to realize virtual and physical seamless docking in the whole life cycle of products such as requirements, preliminary definition, detailed design, manufacture, flight test, certification and maintenance, especially in aircraft design verification, it can achieve better, wider, faster and more economical. However, the digital twin technology has not yet been used in the civil aircraft development project in our country.In this paper, the application of digital twin technology in aircraft design verification is discussed from several aspects, such as aircraft architecture model design, multi-model architecture integration, model parameter identification and verification. It is found that the digital twin technology could provide important guidance and technical support for the design and verification of aircraft model development at all stages , especially for integrated test and verification, and also provide faster, more economical and more powerful support for civil aircraft airworthiness verification and maintenance services.