Abstract: The bauxite resources are abundant in Henan Province， and its identified resource reserves rank second in China. The metallogenic area is tectonically located in the middle and western sections of Mianchi-Queshan collapsed fold fault bundle in Huaxiong platform marginal depression， the southern section of Taihangshan arch fault bundle of Songji and Shanxi platform uplifts in the southern margin of the North China Block. It belongs to northern and western Henan bauxite metallogenic area （grade III area）， Mianchi-Lushan， Songji and South Taihang ore concentration areas （grade IV area）. Based on the project of China Mineral Resources Geology，the geological characteristics of bauxite deposits in Henan Province was studied，and its metallogenic regularities and discussed the genesis were summarized. The study showed that:①the ore-host stratum is Benxi Formation （C2b）， which contains 1~4 ore-bearing layers， among of which there is one main layer with simple structures of bedded， lenticular， or funnel-shaped， and less “non-ore skylight” or gangue. ②The natural types of the bauxite ore are clastic， bean oolitic and layered， indicating mechanical and colloidal chemical deposition. ③The ore mineral is diaspore and the clay minerals are mainly kaolinite and illite， with minor to trace other minerals.④ The ore is generally characterized by high-aluminum， high silicon， low iron and low sulfur， accompanied with Ga， Li and rare earth elements. ⑤ The metallogenic regularity of bauxite deposit can be described as that all the bauxite deposits are the marine facies deposits related with Late Carboniferous paleo-weathering crust， tectonically located on the southern margin of the North China continental block， distributing along the intertidal zone-beach or shallow sea belt of the paleo-continent （island）. Underlying strata are Cambrian or Ordovician carbonate rocks， and the well-developed karst funnel is conducive to the high quality bauxite mineralization. The coexistence of bauxite with refractory clay ore， Shanxi-style iron ore and pyrites is usually found， but their deposits scales are often negatively correlated.

Key words: bauxite deposit, geological characteristics, metallogenic regularity, deposit genesis, prospecting direction