This paper introduces the design requirements and design methods of structural materials in the process of aircraft model design, and introduces the shortcomings of traditional methods in this kind of structural design. Based on this, a full elastic model design method combining metal and composite materials is established. This method has the characteristics of accurate and fast design and simple structure. In order to verify the effectiveness of this method, this paper lists two related aircraft model structure design schemes, and introduces the design process and design results. The experimental results show that the above method can effectively complete the aircraft full elastic model design, the model design is accurate, and can meet the needs of aircraft simulation.