Chrysanthemi Flos is the dry flower head of Chrysanthemum morifolium in Compositae.It has been known as an ornamental plant since ancient times,and also as a plant with the same origin of medicine and food.According to the application mode,practical chrysanthemums can be divided into three categories:medicinal chrysanthemums,edible chrysanthemums and tea chrysanthemums.Chinese Pharmacopoeia (2010 edition) classifies chrysanthemum as a medicinal and edible plant,which is divided into five medicinal varieties:Gongju,Hangju,Chuju,Qianju and Huaiju due to its different producing areas and growing environments.At present,there is not much research on medicinal chrysanthemum,and the work on germplasm resources of medicinal chrysanthemum is not comprehensive.In this paper,the main components,biological functions and biosynthetic pathways of chrysanthemum in recent years were analyzed and summarized.