Cooling method of high-pressure fire-resistant oil

The invention discloses a cooling method of high-pressure fire-resistant oil, which comprises the following steps: adding a dry air loop at the side part of a fire-resistant oil tank, supplementing into the high-pressure fire-resistant oil tank, limiting the flow of compressed air by a throttle valve, reducing the pressure by a pressure reducing valve, and flowing into an air filter to remove dust and oil stain impurities in the air; then through the air dryer, the treated over-dry air enters the high-pressure fire-resistant oil tank from the top of the oil tank, micro-positive pressure is kept in the high-pressure fire-resistant oil tank, and after the over-dry air makes contact with fire-resistant oil, dryness and humidity balance is achieved, water vapor in the oil is taken away, and the fire-resistant oil is prevented from entering the high-pressure fire-resistant oil tank. Meanwhile, the micro-positive-pressure oil tank prevents external wet air brought by oil tank breathing air huff and puff caused by e