The invention provides a transformer oil passage structure, a transformer winding and a transformer, and relates to the technical field of transformers. Based on the first object, the transformer oilpassage structure provided by the invention comprises: first cable paper, second cable paper and a plurality of supporting strips; and the first cable paper and the second cable paper are arranged inparallel; the two ends of the supporting strips are fixedly connected with the first cable paper and the second cable paper respectively, and the plurality of the supporting strips are arranged in parallel at equal intervals. Convex structures are arranged on the supporting strips, and the convex structures are close to the first cable paper and are located at a quarter of the total length of thesupporting strips. The heat dissipation efficiency of an oil tank of a plate radiator is improved.