沥青路面是我国高等级公路与市政道路的主要路面形式,路面各层间接触力学模型是进行沥青路面力学分析与设计的基础.传统的接触模型把沥青路面各层看作是平整且接触的,这并不符合实际情况.沥青路面各层是粗糙且不完全接触的,各层粗糙峰的高度服从高斯分布(正态分布),该文应用概率分析的方法对层间接触的实际情况进行了力学模拟,计算出不论是在弹性接触还是塑性接触情况下,沥青路面各层间的接触面积与外荷载都是成正比的. Asphalt pavement is the main pavement form of high-class road and municipal road in our country. The contact mechanics model of pavement is the foundation of mechanics analysis and design of asphalt pavement. The traditional contact model regards all layers of asphalt pavement as flat and touching, This is not in line with the actual situation.Asphalt pavement is rough and incomplete contact with each layer, the roughness of each layer obeys Gaussian distribution (normal distribution), the paper uses the method of probability analysis of the actual contact between layers The mechanical simulation shows that the contact area between asphalt pavement layers is proportional to the external load in both elastic contact and plastic contact.