Abstract: For power supply problem of coal mine winch, a wireless power supply system for automatic long-distance inspection winch was designed. The wireless power supply mode of the system was introduced in details. Conclusions gotten by theoretical analysis were as following: the system output power and output efficiency decline with increasing of primary coil resistance and increase with increasing of inverter switching frequency. According to the conclusions and long-distance guide for coal mine winch, a sectional power supply mode was designed. The simulation and experiment results verify feasibility of the system.