The utility model refers to the field of application of an electrical transformer, and discloses an electrical transformer cooling device. The electrical transformer cooling device comprises a water cold radiating piece (1), a first water outlet pipe (2), a first water inlet pipe (3), a second water outlet pipe (4), a spraying device (5), an electromagnetic valve (6), a temperature sensor (7), a cooling water tank (8) and a control circuit (9); the water cold radiating piece (1) is interconnected with the cooling water tank (8) through the first water outlet pipe (2) and the first water inlet pipe (3); the first water outlet pipe (2) pumps water through a first water pump (21), and the second water outlet pipe (4) pumps water through a second water pump (41); the electromagnetic valve (6) is connected with the control circuit (9), and the temperature sensor (7) is connected with the control circuit (9); the second water outlet pipe (4) is interconnected with the spraying device (5) through the electromagnetic valve (6). According to the electrical transformer cooling device, the circular water cooling function is realized, the radiating effect is promoted, and the water cold spraying is intelligently controlled.