The utility model relates to a detachable oil tank shoulder seat structure, which belongs to the technical field of transformers. The technical scheme is that the detachable oil tank shoulder seat structure comprises a supporting plate (1), enhancement iron (2) and bolts (3), wherein the enhancement iron is fixed on the supporting plate; a plurality of bolt holes are formed on the enhancement iron; and the bolts are arranged in the bolt holes. The detachable oil tank shoulder seat structure solves the problem that an ultra large transformer is overweight and ultra-wide, greatly satisfies the requirement on the width of a workshop door, and simultaneously meets the transportation requirement of the ultra large transformer.