本文以低温脱脂豆粕为原料，利用微波对其进行前处理。通过四个单因素实验选择最佳实验条件。采用四因素三水平的正交实验确定大豆异黄酮提取比较合适的条件是：微波处理15s, 65%的乙醇水溶液，1:15的料液比，50℃下提取45min。提取率可达到0.78%。试验结果表明，适当的微波处理可以提高大豆异黄酮的溶出率，是一种有效的处理方法。

The paper studied the extraction technology of isoflavones from the defatted soybean meal that was pre-treated by microwave. Through the orthogonal experiment (L9 (34)), the optimal microwave treatment time, alcohol concentration in the alcohol aqueous solution, the ratio of solvent to the defatted soybean, temperature and the extraction time were 15s, 65%, 1/15, 45min and 50℃, respectively, under which the extracting rate was 0.78%. The microwave treatment can enhance the extracting rate of isoflavones from soybean.