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Jasminum yuanjiangense is an narrowly distributed endemic species in Yuanjiang River Valley of Yunnan Province. Four sample plots, belongs to two vegetation types including dry-hot shrubs and savanna were typically selected in the distribution area of J. yuanjiangense. The population age structure and survival curves were created and the type of population structure were analysed by Chen Xiaode's Quantification Method, and predicted population dynamics using time sequence model, and compared the population differences between different habitats. The results were as follows:(1)The population of J. yuanjiangense presented as a growing type and tend to stable(Vpi'=0.004 1). The populations had definite fluctuations during their growth dynamics, and the number of individuals in the pre-growth stage was more than that in the late growth stage. The survival curve of population approached to type Deevey-III and Deevey-I. The seedlings was abundant, but the mortality was high. The growth and development of individuals were limited from young to middle age.(2)The time sequence model predicted that the population of J. yuanjiangense was able to keep stable and the number of individuals would have a light rising tendency in the coming 2, 4 age classes.(3)The population structure of J. yuanjiangense varies greatly among different sites, but it can be roughly divided into two types according to its age structure. Sample plots 1, 2 and 4(Habitat 1)displayed growing type with Deevey-III survival curve, Plot 3(Habitat 2)displayed stable type with Deevey-I survival curve. The habitat of stable type is more suitable for the growth of J. yuanjiangense than the habitat of growing type. [ABSTRACT FROM AUTHOR]