The researches on Kazakhstan oil-wet oil sand were carried out by the solvent extraction method, from which the best solvent was found out. The influences of oil sand particle, the weight ratio of oil sand, the solvent type, and the extraction time of the oil yield were discussed in the experiment. When naphtha was chose as the solvent with the oil sand size blow 40 mesh, the ratio of solvent and oil sand fixed at about 4∶1, and the reaction time about 10 min at room temperate. The recovery yield of oil from oil sand is above 98%. The experiment is instructive to oil-wet oil sand separation.