为保护和建设东南沿海防护林提供理论依据，通过样地调查和数据统计，分析东南沿海防护林木麻黄种群的径级结构，并以种群生命表和生存分析理论为基础编制东南沿海防护林木麻黄种群特定时间生命表，绘制死亡密度函数曲线、危险率函数曲线及生存曲线，并应用谱分析方法研究种群动态趋势。结果表明，东南沿海木麻黄种群有2个死亡高峰，前期的死亡率极高，至后期相对平稳，第IV龄级为种群存活曲线的分水岭，存活曲线更趋于Deevey-II型。此外，在木麻黄种群自然更新过程中基波不明显，但在幼苗生长过程中存在明显的瓶颈效应。

The diameter-class structure of Casuarina equisetifolia L. southeast coastal protection forest population is analyzed by plots investigation and data statistics. In addition, the paper prepares the population specific life table, chart the mortality curve, risk curve and survival curve and analyses the population dynamics by the spectral analysis method that provide the theory basis for the protection and construction of coastal protection forests. The results show that the population has 2 peaks. The mortality rate is high in the earlier stage while stable in the later one. The IV age-class is the watershed of population survival curve. The survival curve trends to the type of Deevey-II. Moreover, the fundamental wave is not obvious during natural regeneration progress of the population but there is an evident bottleneck effect during the seedlings’ growing progress.