Low-noise transformer

The invention discloses a low-noise transformer, and relates to the technical field of transformers, the low-noise transformer comprises a transformer body and a shell, the shell covers the transformer body and surrounds the transformer body, and a hollow separation cavity is formed between the shell and the transformer body; a plurality of horizontally-arranged cooling fins are arranged on the side wall of the transformer body, the multiple cooling fins are distributed at intervals in the vertical direction and located in the partition cavity, a cooling fan is arranged in the partition cavity, corresponding to the cooling fins, in the shell, and the cooling fan covers all the cooling fins. An air inlet and a heat dissipation through hole are formed in the two side walls, corresponding to the heat dissipation fan, of the shell respectively, and the heat dissipation fan is used for blowing air directly facing the heat dissipation fins; the outer wall of the transformer body is coated with a sound insulation la