To study the influence of friction pendulum bearing parameters on the post-earthquake running performance of bridge-track system, a finite element model for a typical bridge-track system is established and the residual track irregularity after near-fault earthquake is calculated. The results show that the application of friction pendulum bearing can improve the post-earthquake running performance of the bridge-track system, but the influence of bearing parameters on the post-earthquake running performance of the bridge-track system is not obvious. By constructing the characteristic curve of track irregularity spectrum, the quantitative relationship between bearing parameters and track irregularity can be expressed by fitting cubic polynomial.