目前 ,在公路设计纸上定线中 ,对离散点的拟合方法大都采用直线形法和曲线形法 ,这两种方法是用直线、圆曲线去靠近尽量多的离散点 ,然后将直线与圆曲线直接相接或利用缓和曲线连接成为连续光滑的平面线形 ,本文在这两种方法的基础上提出用样条函数拟合纸上定线中的离散点 ,并给出公式推导和示例 At present, in the road design paper alignment, the fitting method of the discrete points mostly adopts the straight line method and the curved method. The two methods use the straight line and the circular curve to approach as many discrete points as possible, and then the straight line and the straight line The circular curves are directly connected with each other or the smooth curves are connected to form a continuous smooth linear line. Based on these two methods, this paper proposes to use the spline function to fit the discrete points in the paper fixed lines and to derive the formulas and examples