Abstract: As the main ironmaking process，blast furnace accounts for a large proportion of energy consumption in steel production. So，the energy system conservation in Chinese steel industry must be focused on reducing the energy consumption of ironmaking process. The top gas pressure energy of blast furnace accounts for 7% of secondary energy generated in ironmaking process，if the gas chemical energy would not be included，it accounts for about 33% of blast furnace waste heat. Thus，it is important to recover blast furnace top gas pressure energy for reducing the energy consumption of blast furnace. Therefore，the development process of TRT technology was introduced，and the problems of its application were also summarized in this paper. Finally， from the perspective of energy use，large blast furnace equipped with dry dust collector，coordination and optimization of TRT and blast furnace operation and improving the operating rate of TRT should be paid more attention，in order to improve the energy saving effect.