Abstract: The regulatory mode of selling agents of civil aviation has transformed from administrative approval and governmental supervision to trade association's endorsement and self-discipline after 2006, but the former is in fact a kind of administrative determination while the latter is public administration. Civil Aviation Administration of China should exercise powers to make regulations, supervise trade associations and settle disputes, facilitate Selling Agents of Civil Aviation Committee attached to China Air Transportation Association to become a nation-wide independent institution and carry out self-discipline of selling agents enterprises, while the method of decreasing illegal selling agents is to loosen qualifications of endorsement, cut down items and reduce standard of charge, or to change endorsement into registration, charge some registration fees only and let airliners control its selling agents.