Abstract: This article studies the Cunninghamia lanceolata community’s successive process of the population composition and the change of the community structure in different periods by investigating the representative forest of Cunninghamia lanceolata in the Dajing reservoir’s catchment,and offering scientific base for their rational management. Four characteristics of succession about Cunninghamia lanceolata forest in the Dajing reservoir can be concluded:(1)The evergreen forest is preserved near the artificial forest in Daing reservoir,so the succession of Cunninghamia lanceolata forest has enough seed sources; (2)The evergreen broad-leaved trees intruding into the ground of Cunninghamia lanceolata forest firstly are Elaeocarpus japonicas,Adinandra millettii,Cyclobalanopsis glauca and so on; (3)The intrusion of successive trees usually starts from the gap and ledge of Cunninghamia lanceolata forest; (4)Cunninghamia lanceolata forest,community succession through three stages,namely cunninghamia lanceolata forest,cunninghamia lanceolata and and broad-leaved mixed forest and evergreen broad-leaved forest and the community species diversity increases in turn.

Key words: Cunninghamia lanceolata forest, community succession, species diversity, Dajing reservoir, Hunan Province