测量中经常遇到的一些特殊二次曲线 ,我们事先知道它的类型 ,但是不知道方程的参数。本文利用曲线离散点的平面坐标 ,通过坐标系之间的平移和旋转 ,依据不同曲线标准方程的特征推导了求取参数方法 ,从而达到了对曲线进行拟合的目的。并通过数据进行了验证。 Some special conics often encountered in the measurement, we know in advance its type, but do not know the parameters of the equation. In this paper, we use the plane coordinates of the discrete points of the curve, translate and rotate the coordinate system, deduce the method of obtaining the parameters according to the characteristics of the standard equations of different curves, so as to achieve the purpose of fitting the curve. And verified by the data.