Guizhou has rich and extensively distributed bauxite resources, but bauxite deposits there are mostly concealed sedimentary ones. The easily-discovered shallow and surface bauxite deposits have almost been totally exploited, and hence the experimental test of geophysical methods in search for concealed bauxite deposits is of great significance for further ore-prospecting work. In this paper, the authors describe in brief the basic working procedure of the AMT method as well as geological and geophysical characteristics of the Changgou work area in Jinsha district, Guizhou Province, and emphatically discuss the application results of AMT in the bauxite exploration of Changgou work area. Based on integrated inference and interpretation of the resistivity section, the authors recognized the stratigraphic boundaries between Permian, Carboniferous and Cambrian, delineated favorable ore-bearing places, and attained fairly good ore-prospecting results, as demonstrated by later drilling verification.