The invention provides a transformer oil tank and a transformer, and relates to the technical field of transformers. The transformer oil tank comprises a tank body, corrugate sheets and soundproof plates, wherein the tank body comprises lateral walls and a bottom plate; the corrugate sheets are sequentially arranged on the outer walls of the lateral walls; the soundproof plates are fixedly connected with the inner walls of the lateral walls; the soundproof plates are provided with bending parts which are bent towards the inside of the tank body. The technical problem that in the prior art, thenoise is large is eased.