With the promotion of investment facilitation action plans by international institutions and organizations and the negotiation of multilateral agreement on investment facilitation by the WTO，the issue of investment facilitation has become an international hot topic. Investment facilitation measures mainly include transparency of investment policies and investment related administrative procedures，as well as the improvement of administrative efficiency. The issues of investment facilitation and investment environment are highly correlated. This report briefly describes the international development of investment facilitation issue，the progress and text structure of WTO investment facilitation negotiation，the scope and specific measures of investment facilitation，and summarizes the major measures that have already been taken by Hainan Free Trade Port in recent years. Several policy suggestions are put forward with regards to investment facilitation in Hainan Free Trade Port.