提出一种新的根据摆线轮实际齿廓搜寻其修形量的方法．该方法用包含所需搜寻量的摆线轮实际廓线方程来取代非线性拟合中的经验公式，将需要搜寻的齿廓修形量作为曲线拟合中的待定参数，建立非线性模型，并编制了计算程序．试验表明：所建模型切合实际，方法正确，搜寻精度高，速度快，所需测点数少，程序可靠，具有较高的实用意义． A new method based on the actual tooth profile of cycloid is proposed to search for its shape modification. In this method, the empirical formula of nonlinear cycloid fitting is replaced by the actual contour equation of the cycloidal wheel, which contains the required search volume. The tooth profile to be searched is used as the undetermined parameter in the curve fitting to establish the nonlinear model. And compiled a calculation program. The experiment shows that the model is practical, the method is correct, the searching accuracy is high, the speed is fast, the number of measured points is low, the procedure is reliable and it has high practical significance.