The community structure, species composition, species diversity and succession trend of a mangrove forest in Futian, Shenzhen Bay, China were analysed. Results showed that (1) All the 4-age mangrove communities of the succession process were consisted of Kandelia candel, Aegiceras corniculatum, Avicennia marina, Bruguiera gymnorrhiza and Acanthus ilicifolius ; (2) The community grew rapidly at early succession stage (4a), and kept a fast rate until 17a when its height gradually came to a stable stage, after then it grew very slowly; (3) The community's stand class increased rapidly and came to the 4th stand class at 4a community, but it arrived at the highest stand class (the 5th stand class) until 56a. So the 4a and 17a communities were distributed in the 2nd to the 4th stand classes, while the 56a and 73a communities were distributed in the 2nd to the 5th stand classes. (4) With the process of succession, the coverage of community increased gradually except that 73a was lower than that of 56a, and the same succession pattern of breast height was observed, while the density declined gradually with succession. The species diversity and community evenness increased gradually, whereas the ecological dominance declined with succession. The similarity of the community showed that there was no significant changes in community species composition during the succession. (5) The changes and succession trend of the community was: Community of K. candel, A. corniculatum→ Community of K. candel → Community of A. marina, K. candel→Community of A. marina.