The invention provides a transformer oil passage and a transformer and relates to the technical field of transformers. The transformer oil passage comprises multiple first support bars and multiple second support bars; the multiple first support bars are arranged at intervals, and a first oil passage is formed between each two adjacent first support bar; the multiple second support bars are arranged at intervals, and a second oil passage is formed between each two adjacent support bars; and the first oil passages and the second oil passages are uncrossed. The invention aims at providing the transformer oil passage and the transformer which solve problems of easy blockage of the oil passages, small heat dissipation area and weak anti-short-circuit capacity in the prior art, are relatively simple in structure and technology and has strong operability; and meanwhile, little cost is increased.