Abstract: In this study,the moving mean slope(MM S)model and the moving concentration slope(M CS)model presented by Moldr up et al.for vertical,unsaturated water flow and solute transport are applied to simulate the variation of moisture and solute under infiltration and evapo ration in high clayey soil.Compared with the finite difference method combined with charateristic(CFD),the computational results shaw that the new model has the adv ant age of more efficiency.It is of great importance to predict the long dynamics of salt content in a saline region.