本文在基于盒子模型的基础上简单介绍了CSS布局概念，对比分析了CSS中Position 属性的四个属性值，并通 过具体的网页布局实例进一步说明Position属性中的绝对定位和相对定位在CSS布局中的应用。

This paper introduces the conception of CSS layout based on the box model. It makes comparative analysis on the four property values of the Position attribution, and illustrates the application of the relative attribution and the absolute attribution of Position in CSS layout by a specific case.