Coastal ports are an important infrastructure of the national economy and social development，as well as an important strategic resource for China to participate in international economic cooperation and competition. It is necessary to track the construction，production，and operation conditions of ports and study the supply-side capacity adaptability of ports under the pattern of international and domestic circulations，which is an important basis for industry management by transport departments. This paper reviews the macroeconomic development trend of our country and the development of coastal port throughput during the 13th Five-Year Plan period and analyzes the capacity adaptability of coastal port terminals in detail by levels，regions，cargo categories，and structures. In the analysis，we consider factors such as equipment and technology improvement，adjustment of the conversion coefficient of container weight，and nuclear increase in general terminal capacity according to the actual development of coastal ports. Some suggestions are put forward to promote the professional transformation and pass capacity evaluation of existing general terminals，the intelligent production and operation of ports and the facilitation of public services，and the hub role of ports in the comprehensive three-dimensional transportation network.