Abstract:Castanopsis is a genus of important forest plant in tropical and subtropical regions of China.They are grouped into 3 subgenus,4 sections,3 subsections and 12 series as following:Subgen.I.Caslanopsis Sect.(Ⅰ) Castanopsis Subsect.(1)Eckinocastanopsis:Ser 1.Concinnae,Ser.2.Dentatae,Ser.3.Mekongenset,Ser.4.Chinenses,Ser.5.Tribuloideae,Ser.6.Carlesanae.Subsect.(2)Castanopsis:Ser.7.Argyrophyllae,Ser.8.Castanopsis,Ser.9.Rhamnifoliae.Subsect.(3)Cklamydobalanus.Sect.(Ⅱ) Multijlorae:Ser.10.Roctanae,Ser.11.Ceratacanthae,Ser.12.Callaeocarpus.Subgen.Ⅱ.Limlia.Subgen.Ⅲ.Pseudocastanopsis Sect.(Ⅲ)Fissae< i> Sect.(Ⅳ)Sclerophyllae