Calculus is a branch of mathematics, which mainly studies the change rate and area of functions. Although the high school mathematics curriculum will briefly introduce the basic concepts of calculus, the real in-depth study and theoretical exploration are carried out during the university. According to the teaching arrangements of most universities, calculus generally begins in the first year of college. Calculus includes differential calculus and integral calculus, which study derivatives and integrals of functions and their applications respectively. In the university stage, students not only need to understand the concept of calculus and master basic skills, but also need to explore, prove and popularize the theory, so as to cultivate students' practical application ability in physics, engineering and economy.