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The main objective of this review was to explore the research foci and emerging trends of application of natural products in AD from 1990 to 2019 and evaluated publications qualitatively and quantitatively. CiteSpace V. 4.0 was used to identify top authors, journals, institutions, countries, keywords, co-cited articles, and trends and obtain the visual knowledge maps. Results revealed that the USA, People’s Republic of China and India were the major research countries in this field, while the Western Europe and North America were the areas with frequent international cooperation. Moreover, there was a close collaboration between universities and research institutes. The J Alzheimers Dis was the most productive journal. Alzheimers disease, natural product, brain, central nervous system, disease, and oxidative stress are some of the high centrality and high frequency keywords in the co-occurrence analysis; Indicating Alzheimers disease and its pathogenesis and natural product remain the hotspots in the field. This paper provides an insight into the application of natural products in AD, and provides useful information for AD researchers to find potential collaborators and cooperative institutions.