Study on the coastal city groups of China

On the base of expounding the functions of megalopolis and the trends of world economy development,this paper points out that China should strengthen the construction of coastal megalopolis.By comparing the east coastal natural,social and economical development of China with America,it brings forward that the east coastal area of china has possessed the qualification for megalopolis development.Finally,it puts forward the idea of cultivating coastal megalopolis of China by sub-section,and also conducts study on the constructions of HaDA megalopolis in north of China,JingHu megalopolis in center of China and YueNan coastal megalopolis in south of China.