PPP is a kind of financing and project management mode which has been vigorously promoted in recent years. In the process of implementation, it has encountered problems and obstacles in theory and application. In order to clear the research hotspot and frontier of PPP model, this paper selects ISI Web of Science database to retrieve source data on the theme of Private Partnership Public, and uses CiteSpaceIII software to deal with the node data such as regions, key words and quotations, then draws PPP research domain map of national or regional distribution, classic literatures, hotspots and fronts. It is found that a wide range of cooperative research is carried out in the United States, Britain, China and Australia etc. in the field of PPP, and the total output of papers of each country is comparatively rich. PPP research focuses mainly on the management and application, including risk, contract, performance, governance, domain applications, key success factors analysis, etc.