Mathematics I, II and III correspond to science and engineering, agronomy and economics respectively. The examination contents in these three volumes mainly include linear algebra, advanced mathematics, probability theory and mathematical statistics, among which the examination contents in Math 1 are the most, and those in Math 3 are the least. Mathematics for postgraduate entrance examination can be divided into mathematics one, mathematics two and mathematics three according to the types of test papers; From the examination content, it covers advanced mathematics, linear algebra, probability theory and mathematical statistics; In terms of test paper structure, it is divided into three types: multiple-choice questions (8 ***32 points), fill-in-the-blank questions (6 ***24 points) and solution questions (9 ***94 points). Among them, the number one and the number three are consistent in the distribution of topic types, 1-4, 9- 12, 15- 19 belong to the topic of higher mathematics, 5-6, 13, 20-2/kloc. Different from Math II,1-6,9-13, 15-2 1 are all topics of advanced mathematics, and 7-8,14,22-23 are topics of linear algebra.