Taking roof gardens and including roof greening as the key words, with the help of CNKI library, 500 journal papers on domestic research roof gardens from 2000 to 2019 are sorted out, and CiteSpace V software is imported for visual research and analysis. This paper studies the three stages of slow start, rapid development and steady development of roof garden, and concludes that the research direction of domestic scholars on roof garden mainly focuses on the selection of plants and cultivation matrix, the construction technology of roof garden and the impact of roof garden on urban greening and sponge city, and summarizes the research results, so as to provide the future house for China. The research of roof garden can be used for reference to provide help for urban greening construction.