Water-cooled oil-immersed transformer and heat dissipation method thereof

The invention discloses a water-cooled oil-immersed transformer and a heat dissipation method thereof, which can realize water-cooled heat exchange on the basis of not changing the original structure of the oil-immersed self-cooled transformer, improve the heat exchange capacity of the transformer, and reduce the transformation cost and the transformation difficulty at the same time. Comprising an oil-immersed transformer body and a water-cooling heat dissipation device, wherein the oil-immersed transformer body is connected with an insulating oil inlet and an insulating oil outlet, and a plurality of groups of insulating oil radiating fins are arranged on two sides of the oil-immersed transformer body; the water-cooling heat dissipation device comprises a cooling water inlet, a plurality of sets of cooling water heat exchange plates and a cooling water outlet which are sequentially connected through pipelines, and the cooling water heat exchange plates are installed on one side or two sides of the insulating