Abstract: In order to ensure the safety of mining in Linxi mine, based on the data of mining exposure, drilling, geophysical prospecting and relevant test results, this paper selected Linxi mine as object to study the hidden hazard factors including the geological structure, underground aquifer, flowing water flowing fractured zone, mining goaf, gas enrichment zone, poor sealed boreholes and underground fire zone by field survey, underground observation, statistical analysis and other methods, and further the pertinent prevention measures were proposed. The results showed that the faults, magmatic rocks, Ordovician limestone aquifer and mining goaf are the main hidden hazard factors in Linxi mine and what threaten the safety of mining in different degree. Therefore, it is necessary to take effective measures and make a reasonable plan against the disaster, so as to provide a reliable basis for the prevention of the hidden disaster factors.