According to the relevant regulations of the state, the design, production, use and maintenance of civil aircraft shall be subject to airworthiness management for flight safety. The corresponding aviation products shall conform to airworthiness certification before their operation and use, and airworthiness certification is crucial. However, the late development of the domestic airplane, the mechanism of China's airworthiness approval system is not complete at this stage and is still in the exploratory stage. Therefore, how to better do well in it has become a concern in the aviation field.