Recently there has been more and more focus on the use of social media,like Twitter and Facebook,in disaster prevention and mitigation.China is one of the most serious marine disaster countries in the world,and marine disaster prevention and reduction is an urgent problem to solve.In recent years,the popularization of smart phones and networks has brought Chinese social media into people's daily life.We believe that China's social media has great potential in disaster prevention and mitigation considering the experience of other countries.This paper introduces the use of social media in marine disaster prevention and mitigation in several countries along the 21st Century Marine Silk Road,then summarizes the current situation of China's marine disaster warning,disaster information transmission and disaster management.Finally,some enlightening advices are provided to further improve the application of social media using in China's marine disaster prevention and reduction work by drawing on the successful experience and practice of other countries.