According to two years’ field investigation,identification and literature survey,we discussed mosses floral composition and their characteristics in Wanglang National Nature Reserve,Sichuan Province,China.Then we clarified their distribution in different forest types (virgin forest,secondary forest,and the planted forest).By comparing the data of the mosses in Wanglang Nature Reserve and other six areas around (Yushu,Foping,Shennongjia,Mt.Emei,Mt.Jinfu,Mt.Dawei),this paper summarized the relationships between Wanglang Nature Reserve and the other six areas around.Conclusions can be summarized as follows:(1)Species of mosses in Wanglang Nature Reserve were rich.A totle of 227 species (including five varieties) belonging to 33 families,111 genera were found.(2)The dominate mosses floras of Wanglang Nature Reserve were North Temperate,East Asia,and Endemic to China.(3)The mosses genera of Wanglang Nature Reserve were obviously different in different forest types.The number of common genera was 40 (36.04% of the number of total genera of mosses in Wanglang Nature Reserve),and that of uncommon genera was 71 (63.96% of the number of total genera of mosses in Wanglang Nature Reserve).And,among the three different forest types,secondary forest had the highest species richness,followed by the virgin forest,and then the planted forest.(4)Mosses in Wanglang Nature Reserve were similar to Foping and Mt.Emei Nature Reserve.The similarity coefficient of genus reached up to 60%,and the similarity coefficient of species was more than 35%.