The test of mathematical analysis in Peking University is very difficult. Because Peking University is one of the top institutions of higher learning in China, its mathematical analysis test has very high requirements for students' mathematical foundation. Students need to master solid senior high school mathematics knowledge, including calculus, series, series, limit, etc., in order to cope with the difficult problems in the exam. Mathematical analysis is a relatively in-depth mathematical subject, and the examination content covers many complex concepts and theorems, which requires students to have strong logical reasoning and mathematical proof ability. There are some challenging questions in the exam, which can examine students' comprehensive application ability. The examination time is limited, and the examination content is more, which requires students to answer many questions within a limited time. Time shortage increases the difficulty of the exam, requiring students to complete the questions quickly and accurately. Peking University is a top university in China, and the course of mathematical analysis is one of the compulsory basic courses for all students majoring in mathematics. Therefore, the competition in this course is very fierce, and students all want to get good grades, which makes the examination relatively difficult.