Hainan Free Trade Port(FTP), as the first free trade port established in China, Legislative competence should also have more choices than China Free Trade Pilot Zone. The essence of the construction of the legislative power of FTP is the interaction between the central authorization and the local legislation, and the central authorization legislation is the source of the legitimacy of the local legislative power. The legislative power of FTP is carried forward in parallel with the local legislation authorized by the central government through the local model of central legislation. The local model of central legislation will make the policy experiment ruled by law through major reform, which is embodied in the first test right of local experiment and the formulation of the Hainan Free Trade Port Law(FTPL) through the creative legislative power during the period of “Central and local cooperation”. The local legislation authorized by the central government is the legislative power of Hainan to make laws and regulations on some matters of central ownership according to the local legislative power, especially the special local legislative power, especially the legislative power of the free trade port established by the FTPL, which will expand the local legislative power of the FTP.