The history of mathematics is of great importance to mathematical teaching. To give full play to its educational value and to solve the dilemma faced by middle school teachers, the authors shoot some video clips with math-related historical materials and bring them into classroom. It proves that these video clips not only play a guiding role in the classroom, but also broaden students’ horizon of knowledge. It’s constructive to reach aim of teachingin the syllabus. The goal of teaching is to master knowledge and skills, it also helps to understand the process and methods, attitude and values are to be judged. Meanwhile, it provides a new way of thinking for the study on integrating history of mathematics into mathematical teaching.