Through investigation on original plants and commercial products of the traditional Chinese drug Jiuyanduhuo, the authors have ascertained its botanical origin and present medicinal usage, and found out that Aralia cordata is the main species of Jiuyanduhuo, and A. fargesii is another species that has come into use due to short supply of the main species, and A. henyri is used only in Sichuan and Hubei Provinces. Principal identification features of the original plants and crude drugs with 2 keys have been given, and TLC identification for 3 kinds of Jiuyanduhuo have also been carried out.