二面角是立体几何中最基本最重要的概念之一,是知识交汇的枢纽,纵观近几年高考立体几何试题,围绕二面角设计的试题比比皆是,既有考查基本方法也有考查能力的,随着空间向量的引入,使得命题更加丰富多彩,本文以2008年高考为背景来探讨二面角的问题. Dihedral angle is one of the most basic and important concepts in three-dimensional geometry. It is the hub of knowledge convergence. Looking at the three-dimensional geotechnical test questions of the college entrance examination in recent years, the questions surrounding the dihedral angle design are numerous, and both the basic method of examination and examination are examined. With the introduction of space vectors, the ability to make propositions more colorful. This paper uses the 2008 college entrance examination as a background to discuss the issue of dihedral angles.