The high speed rotation of the rotor will cause the progressive wear of the finger seal,which will affect the leakage performance of the finger seal.Considering the effect of progressive wear on finger seal,the finite element model (FEM) of finger seal fluidsolid coupling dynamic performance analysis was established,and the change law of finger seal leakage performance with increasing working time was investigated.The results show that the change of the contact pressure,radial dimension of finger foot and leakage rate of finger seal with increasing working time were all nonlinear,and the discrepancy in finger seal dynamic performance under considering progressive wear or not is increased with increasing working time.The correctness of finger seal fluidsolid coupling dynamic performance analysis model under considering progressive wear was validated by finger seal leakage performance experiment.The mathematical model of life evaluation was fitted by the changer law of finger seal leakage performance with increasing working time,and the prediction of the finger seal life was carried out by the mathematical model being extrapolated.