Abstract: In order to quickly and comprehensively find out the types and spatial distribution characteristics of the main hidden disasters in Tanhuigou Coal Mine and analyze its potential threat to the coal mine, the methods of on-site inquiry, data access, investigation of surrounding coal mines, rapid scanning of surface unmanned aerial vehicle（UAV） visible light+thermal infrared imaging, ground reconnaissance, underground investigation and detection were adopted to conduct all-round sky-ground-underground investigation of the coal mine. The water hazard factors affecting coal mine safety production are found out, including Miaogou surface water, old empty water, roof sandstone water, and poorly sealed drilling holes; the fire factors include 1^-2 coal room pillar goaf, residual coal in mine roadway, ground collapse cracks, etc. The disaster-causing factors related to roof/ground pressure mainly include hard roof, roof hanging in room mining area, isolated working face, etc. The potential threats of hidden factors to coal mines are studied and analyzed.