The utility model discloses a liquid soaks the cooling device of formula transformer, loose including the tubbiness transformer box body, iron core, coil, piece, the tubbiness transformer box body has two lateral walls that set up in opposite directions and two end walls that set up in opposite directions, and tubbiness transformer box personally experiences sth. Part of the body the apex angle position of between adjacent sidewalls inner wall and end wall inner wall and is installing the supporting angle steel, is concreteing the coolant liquid guiding device on the internal surface of the supporting angle steel that was installing two liang of between adjacent sidewalls inner walls and end wall inner wall apex angle position respectively. The utility model discloses coolant liquid in the internal messenger's piece of tubbiness transformer box looses forms the relative space that keeps apart with parts such as coil, iron cores, has prevented that liquid from soaking formula transformer coolant liquid and turbulent flow or torrent phenomenon appearing in the convection process, has improved liquid and has soaked formula transformer coolant liquid convection current cooling effect, has ensured that liquid soaks formula transformer steady operation.