立体几何问题是历年来高考必考的内容,求立体几何中的位置关系也成为了重要考点,空间向量的引入使其变成解决立体几何问题的一项非常重要的工具。其在解决此类问题时体现出的实用性、灵活性、简便性是其他方法不能实现的,很大程度地降低了立体几何问题的难度。 Stereo geometry problem is the compulsory examination content of the college entrance examination in recent years. It is also an important test point to find the positional relationship in the solid geometry. The introduction of space vector makes it a very important tool to solve the problem of solid geometry. Its practicability, flexibility and simplicity which are shown in solving such problems can not be achieved by other methods, and the difficulty of the three-dimensional geometric problems is greatly reduced.