Abstract: The Shanzhou-Mianchi-Xin'an bauxite metallogenic belt in Western Henan Province is an important resource base of bauxite in China. Through field investigation， structural analysis， statistical analysis and comprehensive research， the geological structure characteristics of the region and typical mining areas have been summarized， the formation mechanism and evolution process of regional tectonics have been expounded， the conceptual model of regional tectonic deformation dynamics has been established， the control effect of different scale structures on bauxite mineralization， preservation， spatial distribution and destruction has been analyzed， and the important significance of geological structure research on bauxite prospecting， exploration and mining has been pointed out. The research results show that:① The Mesozoic-Cenozoic tectonic deformation in this area is mainly manifested by faults， with the formation of faulted blocks and faulted depression as the main characteristics. These geological formations are the product of the near south-north asymmetric extrusion and left-lateral shear-tension coupling during the Indosinian-Middle Yenshanian epoch and the regional extension during the Late Yenshanian-Himalayan epoch. ② On the regional tectonics， there are three groups of faults with different properties， including near EW， NW and NE trending， as well as faulted blocks and depressions of different scales formed by their cross cutting， which play an important role in controlling the occurrence and spatial distribution of bauxite. The well-preserved deposits are mainly distributed in the northern margin of faulted basins.③ Normal faults are widely developed in all mining areas， which have significant damage to the integrity and continuity of ore beds， and have serious adverse effects on mineral exploration ， resource & reserve estimation and mining design & production. Therefore， it is necessary to pay more attention to and strengthen the structural ore-controlling research in this area，so as to better guide the bauxite prospecting， exploration and mining practice.

Key words: bauxite deposit, tectonic deformation, structural ore-controlling, deposit destruction by the normal fault, Shanzhou-Mianchi-Xin'an metallogenic belt, Western Henan Province