Abstract: Geological section is one of the basic means of geological research. With the rapid development of 3D technology, 3D modeling technology has been gradually applied to the field of geological technology. Based on widely available resources such as digital cameras, smart phones, unmanned aerial vehicles and multi-source remote sensing images, this paper studies and analyzes the real 3D model acquisition and 3D profile measurement of typical geological profiles, and introduces projection methods and cartographic synthesis technologies to conduct profile measurement and mapping. Compared with the traditional section, the geological section survey technology and survey results based on this study have a strict mathematical foundation, and the work results based on this study have obvious characteristics of high precision and efficiency, so the real 3D geological section survey technology has a good application prospect.