43.1 percent of area in Dongpu-Yushan region remains original and well-reserved state. Along the altitudinal gradient the vegetation covers the broad-leaved forest zone, Coniferous-broad-leaved mixed forest zone, Picea forest zone, Tusga forest zone, Abies forest zone, Juniperus shrub zone, and alpine tundra, distinguished by the physiognomy and structure. By nested plot method, the species/area curve of each zone was illustrated and the minimum area was determined. The results reveal that surveying the phytosocieties in Abies forest requests 86 meter square by 5 percent increasing ratio, 82 meter square in broad-leaved forest, and 45 meter square in Tsuga forest. 45 plots, sized 10 x 10 meter square, in broad-leaved forests were spotted in the drainage along the Salihsien River. The parameters were taken by gbh (in centimeter) of trees and shrubs (gbh≧cm) and by coverage (in percentage) of grasses, herbs and shrubs (gbh＜cm). Alalyzed by cluster method, ten phytosociety types, i.e. Pasaniz kawakamii-Parachampionella flexicaulis type, Cinnamomum micranthum-Parachampionella flexicaulis type, Litsea acuminata-Beilschmiedia erythrophliia-Parachampionella flexicaulis type, Litsea akoensis-Elatostema lineolatum type, Persea thunbergii type, Cyclobalanopsis stenophylla var. stenophylloides-Castanopsis carlesii type, Cyclobalanopsis stenophyla var. stenophylloides-Pasania kawakamii-Parachampionella flexicaulis type, Trochodendron aralioides-Cyclobalanopsis stenophylla var. stenophylloides type, Schima superba-Cyclobalanopsis stenophylla var. stenophylloides-Arachniodes aristata type and Schima superba-Michelia compressa type. The distributions of above types are mainly affected by the altitude, relative position, topogrpahy and aspect of plots according to the analysis by DCA.