The invention provides a universal power supply loop system. The universal power supply loop system is characterized by comprising a universal power supply loop road surface, a universal power supply loop vehicle and a universal power supply loop system computer control system. The universal power supply loop road surface comprises a hardened road surface, power line loops and a high-voltage power line. A power supply interface is in sliding connection with sliding power receiving blocks on the universal power supply loop vehicle and supplies power to the universal power supply loop vehicle. The sliding power receiving blocks comprise power line sliding power receiving blocks and ground line sliding power receiving blocks. The universal power supply loop system can directly supply a large-current multi-stage direct-current power source to the vehicle travelling on a road in the manner that power is obtained through the sliding power receiving blocks, and the system is suitable for the electrification trend of the vehicle. In dry seasons and areas with little sprayed water, an electric vehicle does not need to use a charging pile, and charging operation can be finished in the normal travel process.