Abstract: The construction of first-class undergraduate courses is an important measure to promote the reform of education and teaching in China, and the implementation of online and offline mixed teaching reform is the path choice to implement the construction of first-class undergraduate courses. This paper explores the connotation development and the theoretical analysis framework of blended teaching, combined with the construction of first-class undergraduate courses to explore the reform of blended teaching, it is proposed that we should change traditional teaching concepts, based on the education and teaching concept of“student development as the center”, systematically plan and design online and offline mixed teaching activities, and strengthen the deep integration of online learning and offline classroom. At the same time, the acquisition ability and channels of online teaching resources are innovatively expanded, in order to promote the teaching reform process of first-class undergraduate courses of online and offline hybrid, and provide case reference for the teaching reform of other similar courses.

Key words: First-class undergraduate course, Mixed teaching, Deep learning, Knowledge internalization, Agricultural economics major, China and foreign cooperation education program