Abstract: After years of exploitation，the amount of iron ore resources in the mining right of Laer Iron Mine in Yuexi County is small，so it is necessary to increase exploration investment to find replacement re⁃ sources.Through comprehensive analysis of metallogenic geological background，geological characteristics and ore-controlling factors of Laer Iron Mine，the results show that: ①The deposit has the same metallo⁃ genic geological background as the iron ore deposit in this area.The iron ore body occurs in the clastic rock of sandstone and shale of Qingmen Formation of Middle Devonian，and is produced in bedding.②The de⁃ posit is stratified and controlled by cheromu syncline.③The palaeogeographic environment in the west of Yuexi is favorable to the formation of iron deposits，which belong to Ningxiang-type sedimentary iron de⁃ posits.④The genesis of the deposit belongs to the sedimentary colloid chemical mineralization of shallow Marine facies.The research results have certain reference value for the prospecting of the same horizon and adjacent area in the region.

Key words: iron deposit, metallogenic geological background, geology characteristic, ore-controlling factor