Online + offline hybrid teaching is a teaching mode with complementary advantages of online networked teaching and offline traditional teaching. It is an important research direction in the current teaching reform, and also a concept advocated by today's technology field. It refers to "optimize the selection and combination of all teaching elements to achieve teaching objectives". In teaching activities, teachers skillfully use a variety of teaching methods, teaching models, teaching strategies, teaching media technology, to achieve optimal combination, improve the teaching effect. Many relevant units and higher education reports have given empirical research and fully demonstrated blended teaching. Online + offline hybrid teaching mode is the general direction of modern development. It breaks the boundary of traditional teaching mode and optimizes the combination of traditional teaching and network teaching, which plays a driving role in the development of education