本文解决了对三参数的霍顿方程的直接拟合问题。文中所设计的方法突破了一般三等份要求序列必须等间距的局限性。本方法中，序列为等距或不等距均可，且所有实测的点资料均可完全被利用，并介绍和讨论了该方法的加权拟合问题。本方法拟合效果优于现行的任一拟合方法，算法简单，精度高，适用范围广泛。 This paper solves the direct fit of the three-parameter Houghton equation. The method designed in this paper breaks through the limitation that the sequence of the general three equal parts must be equidistant. In this method, the sequence can be equidistant or not equidistant, and all the measured point data can be fully utilized, and the weighted fitting of the method is introduced and discussed. The fitting method of this method is better than any of the existing fitting methods, the algorithm is simple, the precision is high, and the application range is wide.