The invention provides an auxiliary device for overhauling electric equipment. The auxiliary device comprises an operation platform capable of being placed between two adjacent two-phase maintenance equipment of a substation and capable of moving, a work platform capable of supporting maintenance workers, and a lifting mechanism, wherein the work platform is provided with a safety belt high-hanging mechanism; the lifting mechanism is used for lifting the work platform; the lifting mechanism is arranged on the operation platform; and the work platform is arranged at the lifting end of the lifting mechanism. The work platform for supporting the overhauling workers is lifted by the lifting mechanism, and the work platform is supported by the lifting mechanism, so that the stability is relatively high, the shaking of workers in the working process is reduced, and the construction quality of overhauling operation is improved. Meanwhile, the safety belt high-hanging mechanism on the work platform is used as a safety belt high-hanging point of a worker when the working personnel is separated from the work platform and is operated by the maintenance equipment, so that the working personnelcan be guaranteed to have a relatively small falling distance once high-altitude falling occurs.