Abstract: Coastal carbon sink, namely coastal blue carbon. In order to verify the development of coastal blue carbon in response to global climate change and explore the potential of coastal blue carbon ecosystems to climate change mitigation and adaptation, we analyzed the protection and restoration condition of coastal blue carbon ecosystems in China. At the same time, we elaborated the influence of coastal blue carbon on climate change and its response mechanism, analyzed the existing problems and management demands of the development of coastal blue carbon in China, and put forward development suggestions of coastal blue carbon in China to tackle climate change. The suggestions include promoting the formulation and implementation of coastal blue carbon management policies; realizing the systematic monitor of coastal blue carbon in China; enhancing the scientific research of coastal blue carbon; actively studying the restoration cases of damaged coastal blue carbon ecosystems; strengthening international cooperation and public participation in coastal blue carbon conservation and restoration.