Abstract: In the actual production, resistivity sounding occupies a very important status, and the high-density resistivity method which develops from it is widely used by the first-line production units. Based on their theories, we know that the data of the resistivity sounding is part of the high-density resistivity method. So if the data of the resistivity sounding can be arranged as the format of the high-density resistivity method, it can be inversed by the software of the high-density resistivity method. In this paper, we will discuss that how to use the Res2dinv to inverse the data of the resistivity sounding, and focus on how to use the C language to converse the data.