In order to perform specific missions, functional components should be towed by aircrafts, such as airborne trailing submarine communication antenna, etc. In these applications, the establishment of scientific models and methods to accurately analyze the steady and dynamic characteristics is a prerequisite to ensure the normal operation of the towed objects. Dynamic model considering aerodynamic force, inertia force, and elastic force of airborne antenna system is established and verified through published steady state results. Dynamic response of the antenna system under disturbance of aircraft unsteady motion and gust is studied, and the extreme conditions such as antenna fracture are evaluated. The results indicate that the analysis results of verticality and tension of the model established in this paper are good, which can be applied to the analysis of the steady and dynamic characteristics of air towed objects, and has engineering value in the design of submarine communication antenna, refueling pipe and other systems.