综合保税区的功能具体包括仓储物流，对外贸易，国际采购、分销和配送，国际中转，售后服务，商品展示，研发、加工、制造，口岸作业等 9 项。
Haikou Integrated Free Trade Zone was set up with the approval of the State Council on December 22, 2008, passed the examination by the State Council’s joint inspection team on January 13, 2011, and formally opened to the outside world on March 16, 2011. The zone is open at the highest level,
enjoys the most preferential policies, and has the most complete functions and the most convenient procedures at present in our country.
Haikou Integrated Free Trade Zone lies in the Laocheng Economic Development Zone of Hainan Province, having an area of 1.93 sq km, and 0.3 sq. km living service areas outside the zone.
The function of Haikou Integrated Free Trade Zone includes the logistics of storage, foreign trade, world purchase, distributing and delivering, international transfer，after-sale service，exhibition，research and development，processing，manufacturing，port operation, etc.
Haikou Integrated Free Trade Zone is planned to build into four areas, namely: logistics area, export processing area, bonded storage area and port operation area.