Abstract:Aluminum is one of the most abundant elements in the earth's crust. In order to form a deposit, it must have a unique geological background and metallogenic conditions. The continental rift basin under the background of rifting caused by the late Caledonian Hercynian movement has created the hydrothermal paleogeographic environment of the lagoon basin in the middle of Guizhou Province, Kaili Bay in Guizhou Province and the semi closed lagoon Bay in the south of Chongqing north of Guizhou Province. All kinds of rocks from early Paleozoic to early Late Paleozoic were weathered and denuded to reach the "discharge of impurities" in the early stage, so that aluminum was initially enriched, transported to the lagoon basin for deposition and later "siliceous matter moved out, iron settled to the bottom" and "aluminum retained" and deposited to form bauxite deposits. The compressional and uplifting background created by the Indosinian Yanshan Himalayan movement in the Mesozoic and Cenozoic, and the foreland basin intermontane basin, which changed the metallogenic conditions, could not form bauxite. Bauxite is a sedimentary type deposit, which occurs in a specific stratum. There may be new concealed large-scale and super large-scale ore concentration areas in Guizhou Province, and there may be similar large-scale bauxite concentration areas in China.