本文就目前概率筛设计中存在的一些技术性问题提出了部分参数的选择计算方法,并对影响筛分效率的主要结构参数:筛面长度、筛孔的形状及尺寸等提出了实用的优化处理方法,对提高概率筛的筛分效率,降低分离粒度下限,节约材料和能耗及加速概率筛的设计和试制过程,扩大概率筛的使用范围等都有一定的理论和实践意义。 In this paper, some technical problems existing in the design of probabilistic sieve are put forward, and some methods of selecting and calculating some parameters are put forward. Practical optimization methods are proposed for the main structural parameters that affect sieve efficiency, such as sieve length, sieve shape and size It is of theoretical and practical significance to improve the screening efficiency of the probabilistic sieve, lower the separation granularity limit, save the material and energy consumption, accelerate the design and trial process of the sieve, and expand the scope of the probabilistic sieve.