Abstract: By applying the contiguous grid quadrats, the technique of censusing every individual, with the time specific method for life-table analysis, it has been studied about the size structure and spatial patterns of dominant populations from Tiantong shrub community in Zhejiang Province. The results show that Symplocos sumuntia is a stable population; Loropetalum chinense is a declining population; Castanopsis sclerophylla, Quercus fabri are increasing populations. Based on analyzing the spatial patterns of these dominant populations, it is shown that only Loropetalum chinense population is of random distribution type while the other populations are of contagious distribution types.