Abstract: The present application discloses a fin structure and a heat exchanger, wherein the fin structure includes: a fin base, the fin base having a tube hole for a heat exchange tube passing through, and the fin base being a corrugated fin; and a plurality of convex parts, the convex part being disposed on the fin base, and the plurality of convex parts surrounding an outer circumference of the tube hole. The fin structure and heat exchanger according to the present application can effectively improve a heat exchange effect of the fin and enhance a heat exchange performance of the heat exchanger.