Abstract：The global nonlinear finite element calculation model of Urban Light Rail Transit Viaduct (ULRTV) in a high seismic region is set up,then the elastic-plastic seismic responses of the bridge subjected to the combined effect of vertical and horizontal earthquakes are calculated under pulse type Near-Fault Ground Motions (NFGMs), non-pulse type NFGMs and Far-Field Ground Motions (FFGMs). And the influence of the Peak Ground Acceleration and Peak Ground Velocity (PGA/PGV) ratio on the seismic response of the bridge is presented. Results demonstrate that the pulse type NFGMs results in the larger lateral displacement at the mod-span of the girder when time-domain analysis.The pulse type NFGMs and the FFGMs maybe bring out the greater internal force compared to the non- pulse type NFGMs. While under frequency-domain analysis, the pulse-type near-fault ground motions greatly impact the seismic lateral seismic response of the bridge in the low frequency band compared to the non-pulse type NFGMs and FFGMs. As for the vertical seismic response of the bridge, pulse type NFGMs influence the response in the second order natural vibration frequency, and the non-pulse type NFGMs and FFGMs influence the response in the first order natural vibration frequency.