人口金字塔（即俗称“百岁图”）作为城市规划工作中内容之一，其作用往往被轻视．本文基于对人口金字塔的含义和类型划分标准的研究，分析其变化的原因，影响因素及发展的一般趋势，提出了适用于复杂的实际情况下新的划分标准，并阐述了在规划领域若干方面的应用。 The Population Pyramid (known as the “Hundred-Year Plan”) is one of the contents of urban planning work, and its role is often underestimated. This paper is based on the study of the definition of the meaning and type of the population pyramid, and analyzes the causes of the changes, the influencing factors and the general trend of development. It proposes new criteria for the division of the complex actual conditions, and elaborates on several aspects of the planning area. Applications.