Abstract: This paper dealt with the dynamics of community structure in a ten-year succession of needle and broad-leaved mixed forest in Heishiding of Guangdong Province.The vertical community structure tended to be complex, while the horizontal one increased by a wide range.There was no big change in species composition,but the dominance of conifers Pinus massoniana and Cunninghamia lanceolata was substiuted by the broad-leaved species,such as Schima superba,Symplocos adenophylla and Schefflera octophylla. The whole community changed from needle and boad-leaved mixed forest into broad leaved and needle mixed forest.The species diversity and evenness of tree layer were increased,the ecological dominance was decreased,and the community became more complicated.