Under some conditions,the effective method in the second kind of line integrals and the differential equation is derived by using the improvising differential method of indefinite integral.

This article expounds the teaching method reformation of second curvilinear integral, bring upped the own way of doing.

This paper discusses the asymptotic property of the Mid-point of the mean theorem for first form curvilinear integral.

In this paper,the application of symmetry method is discussed in calculating curve integral and surface integral type 2,and some useful conclusions and examples are given.

This paper gives the conversion formula from the first type surface integral to the first type curvilineal, and sets a example of using the method to solve exercises.