Abstract: With the rapid development of computer geological software, the efficiency and accuracy of the mapping are greatly improved, and the workload is reduced. We often need to combine several kinds of software to solve practical problems. In this paper, T3 reflection layer structure diagram of the sag in Baxian is drawn as an example to introduce some functions of surfer and double arc software and its application in the concrete work. Then, the necessity of data transformation between double arc and surfer software is proposed and describes the basic method of map transformation, its steps and precautions and so on.