Abstract: In order to find a suitable method for soil's geological investigation in middle-high mountainous regions, we do this research by selecting various geographic units such as dry-hot canyons, alpine areas and broad valleys and different stratigraphic subregions such as sedimentary units, magmatic units and metamorphic units in Daliangshan region, Xichang, Sichuan. Based on geological backgrounds, the soil-forming parent material can be divided into 7 categories and 14 sub-categories in studied areas. It shows that stratigraphic subregions controlled soil's horizontal zoning processes while altitude and geography determined soil's horizontal zoning processes. 31 types of soil-geological units are identified in the studied region.