Abstract: In the context of "the Belt and Road", the reform and opening-up in China is being deepened constantly. The market access to air transport enterprises will be determined by the market instead of the previous strict regulations of the government. Practice in many countries abroad provides proof and reference. At the same time, some problems such as lacking of professional law regulations, complicated access procedures, confusion access supervision task and obvious monopoly characteristics also restrict the market access of air transportation enterprises. Some measures have to be taken such as improving the air transport market access legal system, enforcing negative lists and formal reviews, perfecting regulatory model, promoting ownership reform, maintaining positive competitive order to improve the air transport enterprise market access system in China, making it an important factor in the implementation of "the Belt and Road" strategy.