Considering one-dimensional self-focusing inhomogeneous nonlinear media, we give out the intervals between spatial solitons using the conservation laws of nonlinear Schrdinger equation (NLS). The linear focusing effect and linear defocusing effect on the interaction between spatial solitons have been studied by numerical simulation. The results show that the interaction between spatial solitons increases when the linear focusing effect is considered and the interaction between spatial solitons decreases when the linear defocusing effect is considered. Solitons collide periodically when the self-focusing inhomogeneous nonlinear effect is neglected. The interval between solitons changes periodically with propagation distance when the linear defocusing effect is considered, but the collision between solitons does not occur. Solitons collide each other periodically when the linear focusing effect is considered and the interval increases because the loss can be suppressed by the linear focusing effect.