Epimedii Folium has a long history as a medicine in China, and it is also a habitually used herb in Miao nationality. Studies show that there are various kinds of chemical constituents in the plants of Epimedium Linn. This article classifies and summarizes the chemical constituents and makes a review on the aspects of the species identification and quality control to provide the reference for the further development and utilization of Epimedium Folium.