Abstract: Climate change has become one of the severe challenges faced by all countries. Carbon neutralization, through "carbon emission reduction" and "carbon sink increase", is a key way to address global climate change. Coastal blue carbon ecosystems, such as mangroves, salt marshes and seagrass beds, are huge and long-term sustainable carbon sinks. Therefore, protecting and restoring coastal ecosystems is one of the operable ways to increase carbon sinks. This paper explored the carbon pool and economic value of typical coastal blue carbon ecosystems in China. Two restored wetlands (Niyu mangrove and Yingwuzhou salt marsh) as examples are used to prove that increasing blue carbon by coastal ecosystems restoration is an effective way to realize carbon neutralization. The research results can provide theoretical basis and data support for coastal ecosystem restoration and the blue carbon trading, and further serve carbon neutralization.