本文在Ｈｅｒｍｉｔｅ三次参数曲线的基础上，提出了选取极角变量作为参数来构造设计非圆齿轮节曲线的新方法，使得可根据实际要求将非圆齿轮节曲线设计成任何所需形状，并通过对非圆齿轮低速大扭矩液压马达节曲线的设计实例，展示了该方法的实效性，较好地解决了非圆齿轮节曲线的离散化设计及其形状控制的难题。 Based on the Hermite three-parameter curve, a new method of constructing the non-circular gear curve is proposed by choosing the polar angle variable as a parameter, so that the non-circular gear curve can be designed into any desired shape according to the actual requirements and passed The design example of pitch curves of non-circular gear low-speed high-torque hydraulic motors shows the effectiveness of this method and solves the discretization design of non-circular gear curve curves and the difficulty of shape control.