In order to reveal the influence of the pulse effect of ground motion on the dynamic response of the immersed tunnel, a finite element model for the dynamic analysis of a bi-directional four-lane immersed tunnel was established based on the Foshan immersed tunnel structure in Guangzhou. The nonlinear dynamic constitutive model of soil was introduced into the dynamic finite element model, and the seismic responses of 40 groups of forward directional pulse ground motions (FD) as well as the corresponding non pulse ground motions (NP) with velocity pulse excluded were compared and analyzed by inlaying ground motions horizontally at the bottom of the model. The results show that: (1) the response of FD ground motion of immersed tunnel is larger than NP ground motion (displacement, acceleration and stress); (2) with the increase of PGV of ground motion, the structural responses also show an increasing trend. At the same time, the corresponding influence coefficient K of structural responses pulse is large when the influence coefficient R of peak velocity is large, indicating that the ground motion with velocity pulse has a greater response to the structure; (3) with the increase of pulse cycle T_p,structural responses of pulse influence coefficient K increased at first and then decreased, Moreover the structural responses are larger when T_p performed in the interval near the first natural vibration period of the structure, The damage performed similarly showed that there was significant influence of pulse period of pulsed ground motion on the seismic response of the immersed tunnel.