抛物线的焦点弦问题,是圆锥曲线中一个很典型的问题,抛物线焦点弦的定义和性质是高中数学的重要组成部分,在各类考试中屡有出现,尤其是在高考中出现的频率更是相当大,而考查的形式一般为选择题和大题,本篇论文主要阐述了抛物线焦点弦的性质在高考中的应用。如果能够掌握抛物线焦点弦的这些性质,对处理与此相关的计算和证明等问题带来许多方便。 The parabolic focus chord problem is a very typical problem in the conic section. The definition and nature of the parabolic focus chord is an important part of high school mathematics. It frequently appears in various examinations, especially in college entrance examinations. It is quite large, and the form of examination is generally a multiple-choice question and a big question. This paper mainly describes the application of the nature of the parabolic focal string in college entrance examination. If we can grasp these properties of the parabolic focal string, it brings many conveniences to dealing with the problems associated with this calculation and proof.