However, it is easy to ignore students' needs, experience and life, ignore the actual needs of contemporary social life, and the disciplines are separated from each other, thus limiting students' horizons and restricting the breadth of their thinking. It should be admitted that these shortcomings of the current sub-subject courses are more prominent.

In modern times, disciplines and specialized courses are unified all over the world. The finer the courses, the more categories there are, which not only increases the learning burden of students, but also easily separates closely related disciplines, making it impossible for students to master knowledge as a whole. Knowledge-based teaching methods for specialized courses often ignore students' initiative and enthusiasm, which leads to students' weariness and passive learning, which limits the cultivation of students' innovative consciousness, innovative spirit and innovative ability to a certain extent, resulting in students. Therefore, comprehensive courses are paid more and more attention in modern education.