Abstract: We optimized the purification process of polyphenols from Pinus sylvetris var. mongolica bark to provide reference for its development. Static absorption-desorption and dynamic adscorption-desorption experiment were used to select the best one from nine different types of macroporous resin. Box-Benhnken design was used to optimize the optimum purification conditions. The optimized purification conditions of polyphenols from P. sylvetris var. mongolica were: sample solution concentration was 2.5 mg/ mL, 28 mL sample solution, eluting speed 10 mL/ min, the concentration of ethanol 51.6% and the ratio of diameter to height of resin column was 1∶27.3. Under the optimized purification conditions, purity of polyphenols was 69.23%. The results indicate that AB-8 macroporous resin has distinct effect on purification of polyphenols from P. sylvestris var. mongolica.