Configuration management is a guarantee for developing civil aircraft successfully. For adopting “airframer-suppliers"model to develop civil aircraft, suppliers configuration management is crucial, which is an important part of the configuration management of airframer. To ensure that suppliers could provide continuous control on product configuration during the whole life cycle of products, and to ensure the configuration management of supplier can satisfy the planning type design requirements of the airframer, it is necessary to conduct a comprehensive audit on configuration management system of supplier. The paper presents the main aspects which should be focused on during configuration management system audit of suppliers, to ensure that the audit can achieve purposes.