根据纤维滤材的过滤实验研究和颗粒的拦截吸附机理 ,提出了网络模型概念 ,并由此推出纤维滤材阻截概率函数 .对该阻截概率函数曲线进行分析得出 ,就阻截概率而言 ,随着颗粒尺寸的增大 ,阻截概率也增大 ,但增大的速率随着颗粒尺寸的增大而有所减小 .为了有利于对小颗粒的过滤 ,应选择对颗粒有吸附作用的纤维 ,或者经过特殊处理使纤维具有吸附作用 ,以改善纤维滤材的性能 . According to the filtration experiment of fiber filter and the particle interception adsorption mechanism, the concept of network model is put forward, and the probability function of fiber filter interception is deduced.The analysis of the interception probability curve shows that with the interception probability, With the increase of particle size, the interception probability also increases, but the rate of increase decreases with the increase of particle size.In order to facilitate the filtration of small particles, the adsorption of particles should be selected fibers, Or after special treatment to make the fiber have adsorption, in order to improve the performance of the fiber filter.