Abstract: China promised to achieve carbon neutralization by 2060 at the 75th UN General Assembly. Blue carbon has great potential which can implement carbon neutralization. Blue carbon of coastal wetlands accounts for 50% of the global marine carbon sink, which is an important part of blue carbon. Carbon budget in coastal wetlands under carbon neutralization target is attracting more attention in many fields. This paper used bibliometric analysis based on relevant papers focusing on carbon budget of coastal wetlands during 1979－2020 from Web of Science core database. The paper analyzed the research progress in this field quantitatively by VOSviewer visualization software. Results showed that: ① The numbers of published papers and citations in the field of carbon budget of coastal wetlands kept rising during 1979－2020, especially with a fast growth since 2011; ② The main research fields were environmental science, marine freshwater biology and ecology, and major journals included Estuarine Coastal and Shelf Science, Marine Ecology Progress Series and Science of the Total Environment; ③ The publications were mainly contributed by countries from Asia, America and Europe, and the United States ranked first in the world; ④ Hot topics covered greenhouse gas emissions, climate change and carbon pools, carbon cycle processes and so on. As China's ecological civilization accelerates, marine carbon sinks have been incorporated into national strategies, in which the mechanism of blue carbon sequestration in coastal wetlands with climate change will attract more attention. Based on paper analysis during 1979－2020, it suggested that we should strengthen the study on blue carbon flux and influencing factors, coastal wetlands blue carbon estimation, the related carbon sequestration and sequestration technology to deal with climate change in the future.