The invention relates to a voltage transformation site overhaul device, and belongs to the technical field of electrical equipment. The voltage transformation site overhaul device comprises a base; afixed seat is installed on the base and internally provided with a front-back moving mechanism, and the front-back moving mechanism is connected with a slide seat; a safety seat and an overhaul box are installed on the slide seat, and the safety seat is connected with an up-down moving mechanism; the bottom of the base is connected with castors; and a translation mechanism is installed in the basand connected with brake pads matched with the castors. The voltage transformation site overhaul device has the advantages that front-back adjustment and up-down adjustment of the safety seat can be conducted so that the distance between an overhaul worker and to-be-overhauled equipment can be adjusted, in addition, the moving castors are provided with the brake pads, and the safety of the overhaul worker can be ensured while the overhaul efficiency is improved.