空间向量是高中数学立体几何新增加的内容,借助于空间向量工具,可以最大限度地对避开了思维的高强度转换和各种辅助线添加的困难,对传统解法中的一些问题加以定量化,增强操作性,在求空间角和距离中体现较为明显,但在具体运用过程中也需依据具体问题采用不同的知识点,同时要注意一些细节问题,本文以二面角为例稍做总结. Spatial vector is a new addition to the mathematics of high school mathematics. With the help of the space vector tool, it can avoid difficulties in the high-intensity transformation of thinking and the addition of various auxiliary lines, and quantify some problems in traditional solutions. , to enhance the operability, the more obvious in the search for space angle and distance, but in the specific application process also need to use different knowledge points based on specific issues, at the same time pay attention to some details, this paper uses the dihedral angle as an example .