Abstract: Main problems of mine-used frequency converter were analyzed that input of research and development is insufficient, value exploration is inadequate, pollution to power net is heavy, and use and maintenance is relatively difficult. Development trends of the mine-used frequency converter were expounded in term of explosion-proof technology, variable frequency drive technology and application technology, namely explosion-proof and intrinsically safe is still mainstream of explosion-proof type for the mine-used frequency converter in the future, explosion-proof research of the mine-used frequency converter will focused on optimization design of shell, internal environment control of shell, innovation of heat dissipation technology. Research focuses of the mine-used frequency converter are application of middle and high pressure and high-power inverter, new technologies and devices in the future, clean utilization and energy saving of frequency converter.