As the saying goes, "a good memory is not as good as a bad writing." Indeed, writing down the concepts, formulas and problem-solving skills that the teacher said in class and clearly saving the important information you have heard or seen will help to reduce the burden of review and improve learning efficiency. However, in actual learning, many students are too busy taking notes to deal with the relationship between listening, watching, remembering and thinking, thus affecting the learning effect. This paper only analyzes some misunderstandings in students' math notes to help you improve the efficiency of taking math notes.