Abstract: The coastal zone, where there are many types of carbon sinks and great potential, is not only an important carbon source/sink space with strong carbon capture and burial capabilities, but also a key area for promoting the realization of the national "carbon peak and carbon neutrality" goal. Based on the analysis of natural endowment characteristics of the coastal zone and the coastal blue carbon, three types of ecosystems in the coastal zone, which include mangrove, salt marsh wetland and sea-grass bed, are taken for the study from the aspects such as natural restoration and artificial restoration and the existing technologies for the restoration and sink enhancement of coastal blue carbon ecosystem are analyzed comprehensively and their pros and cons are summarized. In addition, the construction of a realistic and accessible technology system for enhancing the coastal blue carbon sink is explored, which consists of restoration technology, auxiliary technology and management and value technology. Orienting the future, scientific issues and management needs are put forward from both the macro- and the micro-level perspective, in order to provide some scientific reference for the realization of carbon-neutral vision goals.