Abstract: We reviewed the research and development of the slope greening technology in China in recent 30 years from a perspective of patent. The number, type, application time, and applicants for patents applied and issued in field of the slope greening in China during 1991-2020 were searched. The patents were classified into five types of technologies, including soil stabilization, vegetation reconstruction, maintenance, effect evaluation, and construction method. The R&D trend, categories, and key technologies of the slope greening in China were summarized. There were totally 2477 patents in the field of slope greening in China, half of which were invention patents and half were utility model patents. The research and develop in slope greening technologies in China has entered a rapid developing period since 2015. The number of the patents was 886 for soil stabilization, 846 for revegetation, 282 for maintenance, 19 for effect evaluation, and 444 for construction method, which accounted for 35.8%, 34.2%, 11.4%, 0.8%, and 17.9%, respectively. This result indicated that soil stabilization and vegetation reconstruction were the two technology hotspots in China, and that the evaluation technology attracted relatively less attention. In addition, the four key technologies of seed spraying, framing, grooving and bag pillowing have been becoming mature. Further research is needed in development of new materials and the application of special habitats. This paper provides a reference for the innovation and R&D of slope greening technology.

Key words: slope, greening, vegetation, patent, review.