Dry roots of Scutellaria baicalensis Georgi were pulverized and extd. with EtOH under microwaves to recover baicalin, wogonoside, baicalein and wogonin flavonoids. Box-Behnken design model-based response surface method was used to optimize the extn. parameters. The optimum extn. time was 3.3 min, temp. 79 degrees C, liq.-solid ratio 32.6 mL/g and EtOH concn. 66.3%. Under optimum conditions, the yield of flavonoids was 19.79% much higher than that yield under conventional heat reflux conditions.