Marine carbon sequestration is the process and mechanism by which marine activities and marine organisms absorb and fix carbon dioxide in the atmosphere.Because of its ability to complete 93% of the global carbon cycle,it has become the focus of global attention.At present,the Chinese government is focusing on blue-carbon cooperation,leading the countries along the Marine Silk Road to jointly respond to climate change and to jointly manage the international environment.It has launched the initiative of "National Blue-carbon Cooperation Plan along the Marine Silk Road in the 21st Century",which has received positive responses from the countries along the Silk Road.The blue-carbon cooperation mechanism of the countries along the maritime Silk Road includes three aspects:The dynamic mechanism is mainly based on the common desire of governments to coordinate the governance of global climate and environment.The realization mechanism mainly includes cooperative protection of marine biodiversity,cooperative protection of marine environment,cooperative monitoring of blue carbon ecosystem and cooperative management of marine pollution.The safeguard mechanism mainly includes blue carbon research cooperation,high-level dialogue of oceans,cooperative financing of blue carbon,construction of blue carbon market,financial support of blue carbon and support of blue carbon industry.