Abstract: Compared with indoctrination teaching, discussion teaching method has the advantage of cultivating students' independent learning ability and practical innovation ability. However, the traditional deliberative teaching has not come into being a classic and effective teaching mode in undergraduate classroom teaching in China due to its limitations such as time-consuming, less applicable and difficult course evaluation. The construction of discussion-based teaching under "internet + " environment is a new model which can effectively solve the shortcomings of traditional discussion-based teaching. Combining the characteristics of Internet and traditional seminar teaching, we take Physical Chemistry as an example to establish a new teaching model with the structure of "(online before class) theme creation and knowledge sharing, (offline and in-class) theme discussion and content innovation, (online after class) course summary and evaluation". The new teaching mode has good effect for the basic theory course, which not only helps students to better grasp the theoretical knowledge, but also cultivates their consciousness of independent learning and practical innovation ability.

Key words: "Internet plus+", Discussion-based teaching, Independent learning, Physical chemistry course, Teaching model