Abstract: Based on the life table of population and the theory of survival analysis,the authors worked out a static life table of Acacia confusa,drew the curves of mortality rate,survival rate,killing value,survival rate function,mortality density function,cumulative mortality rate and hazard rate function,and analyzed the life process of population.The results showed that the population had one peaks of mortality,and the survival curve of the population trended to the type of Deevey-Ⅱ.Then spectral analysis of the population dynamics of A.confusa was made,which showed that there was a marked regularity of periodic fluctuation in the process of natural regeneration of A.confusa.