Abstract: A new infrared heating cage for thermal vacuum test of satellite components is designed and developed.Compared with the traditional heater band structure infrared cage,it has the characteristics of lower covering coefficient and faster cooling rate.Through the simulation of three infrared cages with different covering coefficients,the temperature characteristics of the product at different heating power are summarized and analyzed.The experimental testing results and simulation results of the developed infrared cage are compared and analyzed.The simulation and test results show that the temperature uniformity and cooling rate of the test specimen under the same working condition are worse than the simula-tion results due to the influence of the heat sink background temperature rise and temperature control strategy in the test.The temperature uniformity of the specimen is optimized by partition of the infrared cage,the temperature uniformity of the specimen is better than 2 K.