High-temperature gas cooling device of aircraft fuel inerting system

The invention belongs to an aircraft fuel inerting system, and relates to a high-temperature gas cooling device of an aircraft fuel inerting system. The high-temperature gas cooling device of the aircraft fuel inerting system is characterized by comprising a ram-air adjusting valve (1), a ram-air outlet (2), a high-temperature gas inlet (3), a stop valve (4), a one-way valve (5), a ram-air inlet (6), a fan (7), a high-temperature gas outlet (8), a temperature sensor (9), a heat exchanger (10) and a controller (11). By the high-temperature gas cooling device of the aircraft fuel inerting system, the circumstance that fuel is used as a cooling medium to cause rising of local temperature in a fuel tank can be prevented, possibility of fuel pollution caused by leakage of a heat sink is completely eradicated, and complexity of installation and distribution of the fuel system due to the fact that equipment is arranged in the oil tank is prevented from being increased.