The invention relates to an air duct structure of a transformer, an air duct baffle and a phase-shifting rectifier transformer in the field of transformers. The air duct structure of the transformer comprises the air duct baffle, wherein the air duct baffle comprises a front side baffle part and a rear side baffle part; the front side baffle part and the rear side baffle part are provided with avoiding arcs used for avoiding coils on the transformer respectively; the front side baffle part and/or the rear side baffle part is provided with an avoiding groove of the baffle, wherein the avoidinggroove is communicated with the corresponding avoiding arc and used for avoiding an axial component on the transformer; the air duct structure further comprises a shielding plate used for entering theavoiding groove of the baffle so as to block the part, close to the groove opening, of the avoiding groove of the baffle; and the shielding plate has an inner side edge and outer side edge, wherein an avoiding space used for allowing the axial component to pass through is reserved between the groove bottom of the avoiding groove of the baffle and the inner side edge, and the outer side edge is inbutt joint with the avoiding arcs to form continuous arcs. Compared with the prior art, the air duct structure is convenient to assemble and disassemble, and the ventilation performance of the air duct structure is not influenced.