The invention relates to the field of high-voltage power transmission and distribution of a power system, in particular to a high-potential energy-supplying system driven by insulating liquid and a constructional method thereof. The high-potential energy-supplying system includes a ground potential platform and a high-potential platform and is composed of a power supply, an impounding reservoir, awater pump, an energy supplying system pipeline, miniature water-wheel generator units, and a rectification module; the ground potential platform is provided with the water pump and the impounding reservoir at a ground potential, and the water pump is driven by the power supply at the ground potential; the high-potential platform is provided with the multiple miniature water-wheel generator unitsconnected in series by the energy supplying system pipeline; and the energy supplying system pipeline adopts insulating materials and is internally provided with insulating liquid, and a closed loopis formed through the energy supplying system pipeline between the water pump and all the miniature water-wheel generator units and the impounding reservoir. According to the method, the high-potential energy-supplying method driven by insulating liquid is proposed. The high-potential energy-supplying system driven by insulating liquid and the constructional method thereof has the advantages of simple structure, good insulation, and high work efficiency, and can provide multi-point high-power working power supply for electricity devices of a high-potential platform of a power system.