Through the research on calculating equations for the gear with displacement angle and on applying the qualification of the constant addendum circle relating to the center distance, the simplified method is provided. 通过对角变位齿轮几何尺寸计算公式的研究,利用轮齿齿顶间隙不变的条件及其与中心距的关系,提出了计算变位齿轮几何尺寸的简化方法。