In order to study the application prospect of the high-precision digital model in the military field, this paper takes the mission requirement of the individual combat quadrotor UAV as the object. Based on digital twin technology, a modeling method is proposed, and the architecture of UAV digital twin system is constructed. The modeling method describes the model from geometry, physics, behavior and rules, and realizes the interactive mapping between physical entity and virtual entity. Finally, a joint experiment is conducted to verify the feasibility of this method.