向量共线是高中阶段的重要内容,也是解决几何平行问题的重要依据.判断向量的共线条件是解决向量共线问题的重要一关,本文从教材的一道例题说起,逐步剖析向量共线的条件,并分析了在高考题中的灵活应用,给我们应对高考指明了方向. Vector collinearity is an important content of the high school stage, and it is also an important basis for solving geometric parallelism. Judging the collinearity of the vector condition is an important step to solve the problem of vector collinearity. This article starts with an example of the textbook and gradually analyzes the collinearity of the vector. The conditions, and analysis of the flexible application of the college entrance examination questions, gave us a direction for the college entrance examination.