There are not many tests on the physical application of definite integral in postgraduate mathematics. The application of definite integral will be tested every year, which is the focus of the test. There are two main test sites for geometry application: the area of plane figure and the volume of rotator. One of the best candidates also needs to master arc length and lateral area. Physical application, the number one scholar has less exams on physical application in recent years, mainly because the number two candidates attach importance to it.