We conducted a systematic research on the diversity and ecological characteristics of wild liana in Hunan Huangsang National Nature Reserve,by means of field survey,sample collection and indoor investigation.The study results showed that:(1)There are 45 families,113 genera and 250 species of liana in Hunan Huangsang,accounting for 21.13%,13.33% and 12.32%,respectively,of overall liana plants in the same region.Among all these liana,there are 3 families,3 genera and 3 species of pteridophyte,and there are 42 families,110 genera and 247 species of angiosperm.For the angiosperm,dicotyledonous liana dominate and have 37 families,105 genera and 223 species,while monocotyledonous liana contain only 5 families,5 genera and 24 species.(2)For all the liana in this region,the families and genera which have less than 10 species accounts for 82.22% and 97.35% of entire families and genera,respectively.The dominant families contain Vitaceae,Ranunculaceae,Papilionaceae,Rosaceae,Celastraceae,Convolvulaceae,Dioscoreaceae,Cucurbitaceae and etc.The dominant genera contain Clematis,Rubus,Actinidia,Vitis,Smilax,Dioscorea and etc.(3)In the ornamental view,the majority of liana own at least 2 types of ornamental characteristics.Foliage plants have the most species,accounting for 92.80% of overall species,while stem-viewed plants have the least species,accounting for 2.00% of overall species.(4)In terms of climbing style,the majority is twining liana,accounting for 46.40% of overall species,while the minorities include curling,hooking and adhering liana,accounting for 24.40%,18.00% and 11.20% of overall species,respectively.(5)In terms of life-form,phanerophyte liana dominates,accounting for 80.80% of overall species,while the minorities include annual plant,geophytes,and chamaephytes,accounting for 10.80%,7.60% and 0.80% of overall species,respectively.(6)In terms of breeding system,hermaphrodite flowers dominate.Of all unisexual flowers,dioecious plants have more species than the monoecious ones.Hermaphrodite,unisexual flowers and polygama account for 70.40%,28.40% and 1.20% of overall species,respectively.(7)There are 72 tropical genera,which dominates the floristic composition and accounts for 63.72% of entire genera.