The invention discloses a thermal-state disc edge seal leakage characteristic test device. The thermal-state disc edge sealing leakage characteristic test device comprises a disc edge seal test bed. The disc edge seal test bed is provided with two gas inlets and a gas outlet, and the gas inlets and the gas outlet are connected with main flow inlet gas, secondary flow inlet gas and mixed outlet gascorrespondingly. The main flow inlet gas is generated by a main flow gas generating device and heated by an electric heating system, and the main flow gas generating device and the electrical heatingsystem are connected through a pipeline; the electric heating system is connected with the main flow gas inlet of the disc edge seal test bed; the secondary flow inlet gas is generated by a secondaryflow gas generating device, and the secondary flow gas generating device is connected with the secondary flow gas inlet of the disc edge seal test table through a pipeline; and the mixed outlet gas comprises a pipeline connected to the gas outlet of the disc edge seal test bed. According to the thermal-state disc edge seal leakage characteristic test device, by conducting temperature compensationon a thermocouple, the temperature in the test process can be tested, and by improving a pressure gauge, the pressure of the heated gas in the test process can be tested.