本文讨论了在运动规律和许用压力角给定情况下确定滚子直动推杆盘形凸轮机构的偏距ｅ和最小基圆半径ｒ０ｍｉｎ的解析方法。由于采用了无量纲参数，本文提出的方法便于编程、绘制和使用诺模图。 In this paper, the analytical method of determining the offset e and the minimum base circle radius r0min of a roller cam actuator with a given movement law and allowable pressure angle is discussed in this paper. Due to the adoption of dimensionless parameters, the proposed method facilitates programming, drawing and using nomograms.