Aiming at the shortages of seismic design factors for retaining wall, the combination of pesudo-static and horizontal slice methods were used to analyze the seismic stability of reinforced soil walls, and the effect of various parameters including angle of internal friction, horizontal seismic loading, cohesion of the backfill, surcharge loading and inllination angle were examined. The results show that:The stability of a reinforced soil wall increases with the increase of horizontal seismic loading and surcharge loading, while it decreases with the increase of angle of internal friction and cohesion of the backfill. Under the same conditions, the inclined wall is more stable than the vertical wall.