Abstract: According to the specification of the deep coal-preserving geological environment and mining geological hazards, the geological hazard and its forming C onditions between deep and shallow coal seam during mining process were analysed and compared.The key geological hazard and its research situation were evaluate d.Finall, the research content on comprehensive geological condition survey, dynamic geological hazard, gas hazard, high pressure water hazard, heat hazard and coal resources comprehensive evaluation theory of deep coal mining were given.