The utility model relates to a radiator for transformer belongs to power equipment technical field. One end in conduction oil cavity's the outside is provided with first recess, is provided with the second recess at the other end, and unlimited mouthful of first recess and second recess is mutual orientation, still is provided with the pivot on first recess, still is provided with elastomeric element in the inside of first recess, and still including the fin, the one end of fin sets up in unlimited mouthful of first recess to pushed up tightly by the spring, make the other end of fin be located inside the second recess. The utility model provides a cooling fin structure dismantles easily, and heat transmission effect is good, the easy washing.