Transformer oil radiator and preparation method thereof

The invention discloses a transformer oil radiator and a preparation method thereof. The transformer oil radiator comprises two oil chamber assemblies and a radiating core assembly arranged between the two oil chamber assemblies. The oil chamber assembly comprises a main flow pipe and a plurality of flow dividers perpendicularly communicating with the main flow pipe. The heat dissipation core assembly comprises a plurality of harmonica-shaped tubes; the flow divider comprises a flow divider body and a blanking cap, and the flow divider body is formed by punching aluminum alloy; the flow divider and the harmonica-shaped tube are fixed through a brazing process, and after the inner walls of the flow divider and the harmonica-shaped tube are rough surfaces through the brazing process, protective coatings are formed on the inner walls of the flow divider and the harmonica-shaped tube through paint filling. On one hand, splashing generated during argon arc welding procedure operation is reduced to a great extent,