The utility model discloses an auxiliary base used for 10-kV transformer forklift replacement. The auxiliary base is mainly formed by a supporting plate, connecting plates and supporting arms in a welded mode, wherein the connecting plates are welded to the two ends of the supporting plate, are coincident with a 10-kV transformer in width and are used for containing the 10-kV transformer, and the supporting arms which are perpendicular to the connecting plates and outwards extend are arranged at the outer ends of the connecting plates respectively and arranged on lifting arms of a forklift. As the auxiliary base is used in cooperation with the forklift, the problem that transformer replacement in a downtown narrow section is difficult is greatly solved, only three persons are needed in the whole replacement process, labor and material resources are saved, operation is convenient, and the replacement time is shortened.