[Objective] Contaminated sites have become a serious environmental problem in China. It is particularly important to safely reclaim and utilize the contaminated sites. In order to make clear status of the current researches on contaminated sites, bibliometric analysis was performed. [Method] Knowledge graph analysis tools, like VOSviewer, CiteSpace and HistCite, were used in the bibliometric analysis of countries, institutions, journals, first authors and hot spots of the publications and important papers contained in the core collection database of the Web of Science.[Result] Results show: (1) The research on contaminated sites involves cooperations between multiple countries. In the past five years, China has come out to be the country with the largest number of papers in this field, and in close cooperation with many countries. Paper contributing institutions in this field, like the Chinese Academy of Sciences, the Oak Ridge National Laboratory, the University of Waterloo, the University of Chinese Academy of Sciences and the Helmholtz Environmental Research Center, have been cooperating extensively; (2) The Science of the Total Environment, Chemosphere, Environmental Science & Technology, Environment Science and Pollution Research, etc. are the main journals publishing papers in this field, and Naidu Ravi, Huang Guohe, and Megharaj Mallavarapu are on top of the list of highly productive scholars. Among the top 10 important papers on contaminated sites, bioremediation-related content occupies a quite high proportion; (3) In the keyword clustering network, key words of papers were sorted into four clusters: biological toxicology research on the contaminated sites, soil heavy-metals contamination and remediation technologies, pollutants environmental behavior and water remediation, and bioremediation of organic pollutants contaminated sites; (4) The bibliometric analysis shows that soil and groundwater are important pollutants carriers in the contaminated site. Remediation of the soil and groundwater in the contaminated site should deem the two as one. The neglect of either one in remediation may cause secondary pollution in the contaminated site. Heavy metals and polycyclic aromatic hydrocarbons are the pollutants of great concerns. Searching of efficient and green remediation technologies are still the focus of future work in the contaminated site research field. [Conclusion] It is still not optimistic for China to address the issue of remedying heavy metals contaminated sites, which calls for further efforts to intensify and implement corresponding works. Therefor it remains to be a focus in solving the problem of contaminated sites to explore high-efficiency green remediation technologies and it will be of great application value to improve the application of bioremediation technology to remedying contaminated sites.