Abstract: Cupressus gigantea is a rare-endangered plant species,and its natural communities are scarce.Seven sample plots were selected on the distributing centers of community.Based on the data from 7 sample plots in different stands in the area,the community characteristics of Cupressus gigantea were analyzed on the composition,flora characteristics,community physiognomy,vertical and horizontal structure.The results showed that the community were composed of 90 species of Tracheophyta which belongs to 41 families and 77 genera,in which 84.42% of genera contained only one species.The flora components,life-form spectrum and leaf characters showed their typical temperate character,the community vertical structure could be clearly divided into arbor layer,shrub layer,herb layer,and some interstater plants.The arbor layer had a crown density of 0.3～0.5 and was dominated by individuals of Cupressus gigantea in the community,and the horizontal structure was not symmetrical.Compared with Picea likiangensis var.linzhiensis community,the species diversity of Cupressus gigantea community was lower.