Fairing is an important part of tethered balloon,and its internal environment is affected by many factors such as working altitude,solar radiation and heat consumption of mission equipment.Taking a certain type of tethered balloon as the study object,two different design schemes of fairing wall heat transfer and fairing wall heat transfer+forced ventilation to simulate and analyze the working environment temperature of the tethered balloon fairing at different working heights.The results show that using the scheme of heat transfer and forced ventilation on the wall of the fairing,the supply air volume of 3 000 m3·h-1 can meet the requirements of the temperature control inside the fairing at different heights,and the scheme has been successfully applied in practice.