A double-loop intelligent rack bus system comprises starting end boxes, bus ducts, bus bars, connectors, plugging devices, plugging boxes, power distribution cabinets and power strips. The number of the starting end boxes is two, and the starting end boxes are respectively arranged at two ends of the bus ducts. The bus ducts are arranged in a double-layer overlapping manner; the bus bars in each section of bus duct are connected end to end through the connectors; the plugging device is arranged on one side of each layer of bus duct, and the plugging device is electrically connected with the bus bar; each plugging box is fixed with the two ends of the bus duct through plugging, and the plugging boxes are electrically connected with the plugging devices; The power distribution cabinets are arranged on the bottom side of the bus duct, the power strips are fixedly arranged in the power distribution cabinets, and the power strips are electrically connected with the plugging boxes through cables. According to the bus system, structural design is carried out on the bus duct, the plugging device and the plugging box, the bus system has a more compact system structure, plugging and unplugging of the plugging box can be facilitated, and operation is convenient; electric arcs are avoided in the power taking process in the system, and high safety performance is achieved.