On the basis of numerical taxonomy study on Epimedium Linn., using Vancouveria C. Morr. & Decne, Diphylleia Michx. and Mahonia Nutt. as outgroups and based on thirty typical morphological characters, fifty-five species of Epimedium were cladistic analyzed and their MP phylogenetic tree was constructed. The results show that on the MP phylogenetic tree, species of Epimedium are clustered together and are separated clearly from outgroups, meaning that this genus is monophyletic. But species of two subgenera including Subg. Epimedium and Subg. Rhizophyllum in this genus are not separated clearly, while species of Subg. Epimedium can be further divided into four groups including Sect. Diphyllon, Sect. Macroceras, Sect. Polyphyllon and Sect. Epimedium. The comparison result indicates that the cladistic analysis result is partial similarity to its numerical taxonomic result.