In order to reflect the amplitude，frequency spectrum and duration of the vibration information，the Arias intensity parameter of seismic discipline is introduced to study the influence of the change of geometric of continuous barrier on the vibration isolation effect. At the same time，in order to highlight the integrity of barrier vibration isolation effect，that is，from the perspective of spatial "field"，a method to obtain field data based on general numerical model is proposed. On this basis，the Arias intensity ratio field and gradient field are calculated by program. Then the vibration isolation effect is revealed by the changes of the ratio field and gradient field. The results show that：the change of depth basically does not change the distribution shape of Arias intensity ratio field. It takes the central position of the barrier as the center and presents a near annular distribution. The gradient value changes sharply near the barrier and slowly in the distance. When the length changes，it will change the distribution shape of Arias intensity ratio field，and the "second center" distribution will appear at the extension position of the barrier. The gradient field changes sharply at the "second center" and slowly at a distance. The change of width has little effect on Arias intensity ratio field and gradient field.