Abstract: In near-field seismic records, the acceleration of horizontal and vertical ground motions is large, so it is necessary to consider the effect of vertical and horizontal ground motions on tunnel response.Therefore, a finite element model of tunnel dynamic is established which introduces the nonlinear dynamic constitutive of soil mass.By selecting 20 groups of pulse ground motion and the corresponding velocity pulse removal processing which subsequently input at the bottom of the model, theunidirectional and bidirectional acceleration, displacement and stress responses of tunnel are obtained and compared.The results show that: There is a consistent rule for tunnel structure under bidirectional ground motion and unidirectional ground motion, that is, with the increase of PGV,the tunnel acceleration, displacement and stress response increase; andthe response of FD ground motion to tunnel acceleration, displacement and stress is greater than that of NP ground motion.The two-way ground motion has a certain influence on the tunnel structure compared with the horizontal ground motion.The acceleration response and stress response are both within ±5% according to the vertical ground motion input influence rate, which indicates that the vertical ground motion has little influence on the tunnel structure.The displacement response is relatively sensitive, and the range of vertical ground motion is wide, but most of them are still within ±5%.