Abstract: Sand control by packing water reduce and sand control materials can improve the flow conditions at hole bottom and play the role of reducing water cut, increasing oil production and stabilizing sand; however, the study on the overall evaluation model on its operation effect is still a blank. Through evaluation and experiment on oil/water relative permeability performance of water reduce and sand control materials, this paper discusses the basic seepage performance of the water reduce and sand control material and its primary function mechanism, has established a simplified model for packing of water reduce and sand control material, and inferred the computing model for the water reduce effect of water reduce and sand control material packing and the prediction of production-increasing effect. Software was used to conduct analog computation of sensitivity of prediction model and verified the water reduce effect and production-increasing effect of the technology of water reduce and sand control packing by example computation. The research finding is of certain reference significance to the establishment of water reduce and oil-increasing measures for high water cut unconsolidated sandstone oilfields.