Abstract: A technology for processing pine oleoresin into rosin and turpentine by using solvent precipitation separation was examined based on analysis of the solubility of representative acid compounds (abietic acid, levopimaric acid and stearic acid), turpentine and unsaponifiable matters in different organic solvents. Effects of the precipitation separation conditions on the yield of resin acids precipitate were investigated for developing the technological processing of oleoresin.The composition of resin acids precipitates was analyzed by GC/MS, and tests for their physical and chemical properties were done.The results showed that when CH2Cl2 was used as a good solvent to dissolve pine oleoresin and CH3CN was used as a poor solvent of resin acids to mix with pine oleoresin solutions, resin acids could be precipitated from pine oleoresin solutions and collected by filtration. CH2Cl2 and CH3CN could be recycled and reused from the filtered solutions by fractional distillation, and then turpentine was separated by steam distillation. Under the optimum processing conditions when the optimum oleoresin, CH2Cl2, CH3CN mass ratio was 1∶13∶2, the yield, acid value and unsaponifiable matters contents of resin acids precipitates were 71 %, 183 mg/g and 2 %, respectively. Without special equipment and complex procedure, the solvent precipitation separation method could be used in all kind of oleoresin containing less amount of turpentine and beneficial to utilized the oleoresin resources reasonably because it did not change the chemical compositions of resin acids from oleoresin raw materials.