Abstract: Tropical region in China is located on the margin of Asian tropics, so-called northern tropics. In the floristic division, this region belongs to the part of Indomalaysian floristic realm. Large area of limestone mountain is situated in the southwestern Guangxi. There is alsoa certain area of primary forests, which are called limestone seasonal rain forests.Although the community types of limestone seasonal rain forests are various, some types dominated by Burretiodendron hsienmu occupy larger area and have great economic utility. By analysing the population composition and ecological characteristics of different species in community, most edificators belong to the normal type of population, in other words, their individuals distribute in all layers of community, including big tree, small tree, sapling and seedling, with larger number and frequency. They grow very luxuriantly. It shows that they can fit the variation of environment in the whole community carrying on normal growth and regeneration. If there is no human disturbance, they will keep their edificator position in a long period. Some heliophytes only have big trees of upper layer and several small trees of middle and lower layers, but their sapling and seedling are seldom seen. It is obvious that it is difficult to regenerate under shade condition of community. It may be said that they belong to degenerative type of population. But the variation of crown density in a comm-unity may be often occurred, so it is not easy to remove them from the community. They usually get the growing chance in the border of the forest or some part of crown gap which have enough sunshine and they grow very quickly and occupy certain space. However, their individuals are always limited. In such zonal community type, plants which belong to the adventicous type of population are seldom seen. It means that those species, which have a lot of sapling and seedling, are possible of developing into dominant or edificator, but recently lacking trees of upper layers. Because of dominants and edificators in community grow and develop well, the community composition and environment are controled by them and the companion species are relatively steady, it is very difficult to invade the community for other species. All these show that the formation and development of limestone seasonal rain forests is quite suited to the local environmental conditions and it is in a more mature stage of relative stable community type. If there is no anthropogenic disturbances and other strong influence of factors, causing essential change of the crown, the whole community will not take place obvious variation. Even if there occurs some breaking in some parts of crown, it can also recover quickly. Of course, population change of different species in the community will be frequent.In general, limestone seasonal rain forest characterized by Burretiodendron hsienmu mostly is composed of various species with different age in natural condition. In order to promote the regeneration and development of Burretiodendron hsienmu, it must be used that clear cutting in small area and remaining about 15 individuals of parents trees in 1 ha. In such a case, the natural regeneration of Burretiodendron hsienmu will obtain rapid development, then green mountains may be remained by means of selection method and sustained yield working. Recently, it urgently needs to establish natural protected areas, carrying on close hillsides to facillate afforestation, on the one hand, it may be better conserved original natural forests; on the other hand, it is possible to quickly recover some cutting blanks into forest. Now four reserves have been established in the centre of distributional area of Burretiodendron hsienmu, more effective management, brings into play multipurpose role of reserve, mentioned above goal will certainly reach.