The industrial control systems (ICS) is a core component of our country's important infrastructure, such as civil aviation, energy, power grid stations and traffic. In recent years, due to the occurrence of national ICS attacks such as "Stuxnet", the world has paid more attention to the security of it. At present, all civil aviation ICS are operating in physical isolation. However, from the perspective of the development of the smart civil aviation and the 14 five-year civil aviation plan, the ICS will focus on the efficient collaboration between systems and evolve in the operation mode of interconnection. The overall safety protection of the ICS will become the key to the safe and efficient operation of civil aviation. In this paper, we introduce four classic civil aviation ICS, and build a simulation industrial platform for vulnerability mining and testing. Then, we propose a vulnerability mining framework based on the Sequence Generation Adversarial Network (SeqGAN) and Peach, and develop a prototype system based on Peach open source libraries, which includes a new service-based exception monitoring method. Finally, we deployed the prototype system to the platform and discovered two zero-day vulnerabilities that causes the ICS denial of service and data overflow.