This paper is targeted at the study of the Junior High School teaching materials, such as the teaching method of ratios, ratio and proportion expression. Although there are a lot of methods present in the general textbooks. But the purpose of this paper is to make the Junior High School student clear to understand the meaning, and let it can be applied to solve the problem of life, and focus on what they are easy to misunderstand or what they know are unclearly. Use some simple examples, let the beginners can get more understanding on this subject.