The combination of urban rail transit and PPP mode can effectively alleviate government fiscal pressure and improve project operation efficiency. The literature of China National Knowledge Network (CNKI) database included?449 urban rail transit PPP mode studies from 2011 to 2021 is collected as the study object the documentary metrology method is used, with the number of documents, issuance time, research institutions of the field with CiteSpace 5.7.R1, Text author,to make vocalization analysis of the source and keyword cluster, keyword cluster, keyword time.Through knowledge map, the current research status of this field is analyzed, and the research dynamics are reviewed, and the key issues that are difficult to observe or statistically in the study have been visited.It is proposed to strengthen cooperation between authors, institutions, institutions, authors and institutions, and enhance relevant proposals such as cross-discipline support.Analysis of the research trend of nearly ten years from the keyword angle analysis is three stages.Combing all stages of research focus, summing up experience to provide a certain reference and reference for the future theoretical research and practices.