Abstract: Jiugongshan Nature Reserve lies in the transitional region from middle subtropical zone to north subtropical zone in Hubei Province,China.By investigation and analysis,the vegetation of Jiugongshan Nature Reserve is divided into 5 vegetation-type groups,11 vegetation types and 32 formations.In comparison to the vegetation of Jinggangshan Nature Reserve,Lushan Mountain,Houhe Nature Reserve,Qingliangfeng Nature Reserve,Shennongjia Nature Reserve and Dongzhai Bird Nature Reserve,both the floristic composition of the main seed plant species and forest-vegetative formation and distribution of the vegetation of Jiugongshan Nature Reserve display characteristics of regional transition.