First, the test difficulty is different: the order of test difficulty of postgraduate mathematics is: postgraduate mathematics1> Postgraduate Mathematics 3> Postgraduate Mathematics 2. Therefore, students who are preparing for the postgraduate entrance examination for mathematics should start reviewing the subjects of Mathematics 1 and Mathematics 3 as soon as possible, while students with poor mathematical foundation need to spend more time.

Second, the applicable majors are different: there are differences in the application majors of Postgraduate Mathematics 123, and the applicable majors of Postgraduate Mathematics 1 are mainly engineering. For example, the first-class disciplines of management science and engineering that award engineering degrees require the use of graduate mathematical papers: mechanical engineering, electronic science and technology, biotechnology, mechanics, optics and so on.