Abstract: On the basis of quadrate investigation, with the method of “spatial sere substituting for time sere”, the communities of Jinchengshan National Forest Park were divided into eight types by group average clustering, and each structural feature of the communities was discussed individually. Moreover, the pattern for dominant population structure was analyzed by population structure development and survival curve. The results showed that Cupressus funebris,Cunninghamia lanceolala+Quercus acuissima belonged to the declining populations, whereas, Cupressus funebris+Quercus fabric, Pinus massoniana+Cupressus funebris and Quercus acuissima+Quercus fabric were growing populations, and Symplocos szechumensis+Lindera setchuenensis, Pinus massoniana+Symplocos szechumensis and Pinus massoniana kept stationary. Habitat condition and human disturbance were the main factors affecting the age structure and the dynamics of populations, and thus, the protection and fostering of the communities of Jinchengshan National Forest Park should be reinforced, meanwhile, the human disturbance should be reduced.

Key words: Jialing River Basin, Jinchengshan National Forest Park, community type, structural features, survival curve