The utility model discloses a mutual inductor installation structure capable of reducing the power failure time of a bus, which comprises a switch cabinet and a holding member arranged on a mutual inductor, wherein a horizontal partition board arranged in the switch cabinet separates a cavity of the switch cabinet into a high-voltage bus chamber and a mutual inductor chamber, the horizontal partition board is fixedly provided with two bolts, and one side of the holding member is provided with a U-shaped opening matched with the bolt. Fixing nuts of the high-voltage bus chamber are not opened any more when the mutual inductor is disassembled or assembled, thereby reducing the power failure time, and being quick in assembling and disassembling; one side of the holding member is provided with the U-shaped opening matched with the bolt, people finish installation by only installing the holding member on the mutual inductor, installing a nut on the bolt, clamping the U-shaped openings of the holding member into the two bolts, and tightening the two nuts, thereby being quick in installation speed, and reducing the power failure time; and when the mutual inductor is disassembled, the two nuts are loosened, the holding member is taken out, and the mutual inductor is replaced without opening the fixing nuts of the bus chamber, thereby saving the time, and being high in detection efficiency.