Abstract: Protection of aerodrome obstacle free space is one of the key issues in revision of Regulation on the Mana-gement of Civil Airports. Although both the current civil aviation legislation and local legislation have stipulated the responsibilities in protection of aerodrome obstacle free space, there are still problems of unclear identification or conflict of responsibilities. Drawing on the theoretical research on authority relationship, this paper considers the attribute of responsibility of aerodrome obstacle free space protection in terms of benefit scope, implementation efficiency, and resource equivalence. Through this revision, we will find out and fill in the gaps of protection provisions in Regulation on the Management of Civil Airports, and straighten out the relationship between industrial regulatory responsibilities and local territorial management. A comprehensive consideration of the national transport network and civil aviation development objectives is given to further clarify the distribution of responsibilities in protection of aerodrome obstacle free space, and then to improve the degree of legalization of management of obstacle free space.