Abstract: At present,the numerical simulator for polymer flooding has no parameter estimation function and there is no specific estimation method as well.Therefore,preprocessing model of numerical simulation is necessarily to be developed. Through laboratory analysis of viscosityconcentration curve,rheology curve,permeability decline coefficient curveand adsorption curve and appropriate mathematical conversion of these function relations,least square method is adopted to solve this model.On the basis of that,the visual interface of parameter estimation has been realized.By using of parameter estimation model,enhance the working efficiency of numerical simulation for polymer flooding.