Based on the requirements of national airworthiness regulations, airworthiness management, civil aircraft development process, and airworthiness certification process, this paper analyzes the airworthiness requirements related to the development of civil aircraft landing gear system to define the airworthiness objectives and main tasks of civil aircraft landing gear system in the process of approval (random airworthiness) together with aircraft type certification, production certification and airworthiness certification, and also briefly discusses the continuing airworthiness work of the landing gear system. Although the airworthiness work of the landing gear system is a part of aircraft airworthiness certification, the research and development unit of the landing gear system still bears the “first responsibility” for the airworthiness of its products. The research content has a guiding role in the project planning and development system construction for the civil aircraft landing gear system development unit.