Abstract: Coastalline is not only the space carrier of marine economic development in coastal areas, but also an important platform to protect the marine environment and maintain the ecological balance of coastal zone. Generally speaking, it can be divided into natural shoreline and artificial shoreline. Since the 1990s, with the rapid economic and social development of China's coastal areas, the intensity of offshore sea area and coastline development has been increasing. By 2016, the proportion of artificial coastline in China has exceeded 68.5%, and that of individual provinces and cities has exceeded 90%. Overload development and utilization of the coastline has brought about environmental problems, and also caused difficulties in the protection and management of the coastline. It is suggested that work should be carried out from the perspectives of establishing coastline management system, establishing responsibility supervision mechanism of natural coastline retention rate, implementing coastline rehabilitation and implementing coastline supervision and management and so on, so as to promote the protection and utilization of coastline resources in China in the new era.