Based on the necessity of offering specialized English courses and the characteristics of this kind of courses, we introduce three one thirds of the teaching modes suitable for the science and technology foreign language reading courses of mathematics majors in this paper. By introducing the content of each third of this teaching mode, we can give full play to the main role of each third in classroom teaching and achieve the effect that three one thirds more than one. It is hoped that through the research of this teaching mode, we can find the suitable model for this kind of course  and popularize continuously.