Diagnostics of traditional Chinese medicine (TCM) is the basic and main course of TCM. It is also a required course for undergraduates majoring in traditional Chinese medicine to study on campus for the first time. It is a course that every TCM student must master. The teaching of diagnostics of traditional Chinese medicine not only lays a solid foundation for students' learning of various courses of traditional Chinese medicine in the future, but also provides help for them to go to clinical positions smoothly in the future. Therefore, it is particularly important to carry out the teaching of TCM diagnostics. However, how to carry out the teaching of diagnostics of traditional Chinese medicine is a long-standing topic. Teachers in Colleges and universities of traditional Chinese medicine have their own teaching methods and teaching characteristics. According to the actual situation of students, this paper discusses how to better carry out diagnostics of traditional Chinese medicine for undergraduates from three aspects: the compilation of teaching plan, the application of teaching methods and the practical teaching So that they can benefit from the teaching, for the better development of TCM diagnostics service in the future.