This paper was studied on using macroporous adsorption resin to improve the purity of Rosmarinic acid(Ros A).We choose appropriate macroporous adsorption resin and study the conditions of separation and purification for Ros A.The result of saturated static adsorption of different types of resins showed that NK109 was suited to be used on Ros A.Through the study of dynamic adsorption,NK109 had the best adsorption ability when the concentration of Ros A was 838.6mg/L,the adsorption current velocity was 2.0BV/...