A comparatively complete research is done on the question of the rightest piont of the line of intersection and gives some different accurate graphic drawing methods.

• 本文较全面地研究了正交圆锥与球相贯线的最右点问题，给出了相贯线的存在条件以及最右点的完整数学表达式，并给出了最右点的几种不同的精确作图方法。