High school mathematics includes algebra, solid geometry and analytic geometry. Among them, algebraic operation can cultivate our rigorous thinking and habit of doing things. For us ordinary people, this rigorous thinking and habit is very important no matter what we do in the future. Solid geometry is an important tool to cultivate our spatial imagination. In our later life, many things are understood through language description and listening. Only by cultivating enough space imagination can we better understand other things. Analytic geometry combines some characteristics of algebra and geometry. Of course, other means can also cultivate these abilities, but in our country, we can only cultivate these abilities by studying books at school.