Abstract: The purpose of this paper is to explore the influence of the geometry of fault model on the characteristic values of slow slip events in numerical simulations. In this paper, three different subduction zone geometric models were used to numerically simulate slow slip events （SSEs） in Cook Inlet, Alaska in the framework of rate- and state-dependent friction law and a quasi-dynamic algorithm so as to explore the influence of fault geometry on SSEs characteris-tics. The results show that the geometric factor does have great influence on the spatio-temporal evolution of SSEs. The width of the SSEs zone plays a key role in the simulation of SSEs. And the areas with gentler terrain lead to larger and faster events. The results are helpful to further understand the genesis of SSEs and the influence of fault geometry on the evolution of SSEs.