Abstract:The contiguous grid quadrats were applied to sampling for field data, V / m ratio t-test, negative binomial distribution, David and Moores7 index, index of mean crowding and index of patchiness, index of dispersion and intensity of pattern have been used to analyse the zonation pat-tern and stratification pattern of Shorea chinensis population, which is one of the main dominant and rare species of tropical seasonal rain forest, in Bubeng region situated in the south of Yunnan province (about N 21 ° 25‘-21 ° 28 ‘, E 101 ° 34 ‘-101 ° 52 ‘). The results indicate the zonation pattern of the population is of the contagious distribution, and the degree of congrega-tion, the scale of pattern patch and the intensity of pattern are^small-big-smalP model with the increase of the population age. The stritification pattern of the population is of the contagious ditribution-random-uniform distribution from sapling to adult tree. The contagious indexes in re-lation to density are linear reduction with the increase of the population age, but the contagious indexes in irrelation to density are ^small-big-smalr^model and the changes are less.