Abstract: The Anchang bauxite deposit is located in the Anchang syncline in the southwest of the Qianbei - south Chongqing metallogenic belt, where the bauxite enrichment and mineralization conditions are superior. In this paper, based on the existing geological work, the geological characteristics of the deposit are analyzed, and the constraints of ore-bearing strata and bauxite enrichment, ore-forming material sources, basement microgeomorphology changes and climate on bauxite enrichment are explored. The research shows that the Anchang bauxite deposit is a sedimentary deposit and the ore-bearing rock series is Dazhuyuan Formation. The ores are mainly of iron-bearing and high-sulfur type, including earthy-semi-earthy bauxite ore, dense bauxite ore, clastic bauxite ore and pisiform bauxite ore. The orebody is mainly distributed in the north west of Huajian Tianfengsi line. Orebody No. 11 is the largest single orebody found in the northern Guizhou area, reaching a large scale. The deep part and the edge of the orebody extending to the oblique axis should have a good prospecting prospect. The shale of Hanjiadian Formation is the main source of ore-forming materials, and the limestone of Huanglong Formation is the important source. The deposit of ore-bearing rock series is controlled by the fluctuation of basement geomorphology, and the thickness of ore-bearing rock series is large in the negative terrain depression area, which is also often the area with large thickness of bauxite ore body. The enrichment of bauxite is controlled by full exposure and leaching. The basement of Hanjiadian and Huanglong formations may be the source of ore-forming materials, and the basement is exposed to the surface and enriched with aluminum by leaching and desilication.