The difficulty of entrance examination for advanced mathematics varies from person to person. For some students with solid foundation and strong learning ability, the difficulty may be moderate. It may be difficult for some students with weak foundation and improper learning methods. Generally speaking, the difficulty of advanced mathematics postgraduate entrance examination is mainly reflected in the following aspects:

1. Huge knowledge system: Advanced mathematics involves a huge knowledge system, including calculus, linear algebra, probability theory and other branches, which requires students to master a large number of theorems, formulas and problem-solving methods.

2. Strong theory: Advanced mathematics is a highly theoretical subject, which requires students' abstract thinking ability and logical reasoning ability. Many concepts and theorems need to be thought deeply on the basis of understanding in order to be better applied to practical problems.

3. Large amount of calculation: Many problems in advanced mathematics need complicated calculation, especially in the process of seeking limit, derivative and integral. The amount of calculation is often large, which requires students to have strong computing ability.

4. Various types of questions: There are many types of questions in advanced mathematics for postgraduate entrance examination, including multiple-choice questions, fill-in-the-blank questions, and solution questions. This requires students to have a strong ability to take exams. In addition, in recent years, the proposition trend of postgraduate mathematics pays more attention to examining students' comprehensive application ability, and many questions require students to master multiple knowledge points to get correct answers.

5. Time is tight: the time for the entrance examination for advanced mathematics is limited, and students need to complete a large number of questions in a limited time, which puts high demands on students' speed and psychological quality.