The invention relates to a live-working robot of a transformer substation. All signals of a control system are wirelessly transmitted, so that the operational safety performance is improved for operation personnel. The live-working robot comprises a work machine and a remote-control command vehicle; the work machine mainly comprises a power system, an actuating mechanism, a hydraulic control system and an operating system, the actuating mechanism mainly comprises a traveling mechanism, a rotating platform, a lifting platform and a hydraulic mechanical arm with six degrees of freedom, the lifting platform comprises a plurality of insulating arms, the rotating platform is mounted on the traveling mechanism, the lifting platform is connected with the rotating platform, and the hydraulic mechanical arm with six degrees of freedom is connected with the lifting platform; and the hydraulic control system comprises a hydraulic pump and is connected with the power system, and the hydraulic pump is further connected with an oil tank on the traveling mechanism and is respectively connected with a lower electromagnetic reversing valve bank A, a central crossover coupling, an upper electromagnetic reversing valve bank B, a mechanical arm hydraulic servo valve bank C, driving cylinders of the various insulating arms and a rotating motor by a distributing valve.