In order to avoid the possible power loss of suspended monorail vehicles when passing through the non-electric zone of conductive rails, two high-voltage bus circuit designs were recommended, and the current changes of the power supply station and the main fuse were analyzed and compared when the monorail vehicles passing through different non-electric zones. The comparison result showed the design that traction system adopting the slight braking and high-voltage bus setting only for auxiliary power system and air-conditioning equipment is better and worth to recommend.