Abstract: The basic principle is one of the basic elements of the law and the indispensable soul of the law. The basic principles of the aerospace law are legal principles applicable to the space legal system and embody the fundamental value of the space law. They are the concretization of the basic principles of the lawand constitute the basis and starting point of legal rules in the aerospace field. According to the main characteristics of space law, such as comprehensiveness, internationality, systemicity and development, this article believes that the basic principles of space law should include at least three basic principles: principle of compliance with international law, principle of safety, security and development, and principle of interest protection and interest balance.