By simulating the static and dynamic working conditions of a specific areoengine,the leakage characteristics of pressure balanced finger seals were studied by experiment.The effects of rotating speed,pressure ratio and temperature on the leakage characteristics of finger seals were investigated.The results show that the pressure balanced finger seals can effectively alleviate the hysteresis phenomenon and has excellent sealing performance.With the increasing of pressure ratio,the leakage parameters of finger seals are first increased and then gradually tend to a constant,with the increasing of speed and temperature,the leakage parameters are decreased.Compared with conventional finger seals,the static leakage parameter of pressure balanced finger seals at high temperature of 350 ℃is decreased by 29.4%,the dynamic leakage parameter is decreased by 34.2%.