Abstract: In order to comprehensively understand the current situation and frontier dynamics of research in tunnel fires in China, 2 406 relevant papers were searched from 2001-2021 in the database of CNKI, and the bibliometric analysis was conducted with the help of CiteSpace software, and the knowledge map was drawn. The results show that: the number of research papers in the field of tunnel fires shows an overall growth trend, and the process can be divided into three stages; the cooperation between authors is relatively close, forming a certain network structure; fire scenario simulation technology is a good tool to explore the smoke distribution and temperature distribution in the field; highway tunnels are the main place for road tunnels research, and high-altitude tunnel fires are a recent research topic; smoke exhaust, ventilation, temperature analysis and personnel rescue of tunnel fires are hot topics in the field, and we will continue to analyze and research around the above hot topics in the future.

Key words: tunnel fires, China national knowledge infrastructure (CNKI), CiteSpace, bibliometric analysis, knowledge graph