Abstract: The Dai nationality of Xishuangbanna uses "binomial nomenclature" to plants.Their concept of "genus" contains "Life from" and "economic form" while the names of "spe-cies" are described on the basis of specific properties, characteristics, uses, origins and habitats of plants etc. , which has a higher practical value. Moreover, the research establishes a system of Dai's plant taxonomy according to their traditional concept and nomenclature of plants.

Key words: The Dai nationality of Xishuangbanna