In present paper,the corn glutelin was extracted from corn gluten meal (CGM), and then it was hy-drolyzed by protamax. Further,the hydrolysate was digested by pepsin and trypsin,the concentrations of pepsin and trypsin were optimized when antioxidant activities of the hydrolysates as an evaluation criteria for the prepa-ration of hydrolysate,which were rich in Gln. The results showed that the yield of hydrolysate by protamex was (54.41±3.26)%,and its hydroxy radical scavenging capacity,ferrous ion chelating ability and reducing power were(29.50±0.31)%,(73.33±0.62)%and 0.50±0.01,respectively. The hydroxy radical scavenging capacity, ferrous ion chelating ability and reducing power of the hydrolysates after the digestion were (55.88±0.94)%, (90.44±0.01)%and 0.40±0.01,respectively.%以玉米蛋白粉为原料提取玉米谷蛋白，利用蛋白酶对其进行酶解，制备蛋白水解物，再用胃蛋白酶及胰蛋白酶对其进一步消化处理，以抗氧化活性为指标对消化过程中蛋白酶加量进行优化，制备富含谷氨酰胺的具有抗氧化功能的蛋白水解物。结果表明，玉米谷蛋白经复合蛋白酶水解后，蛋白收率（54.41±3.26）%，水解物的羟基自由基清除率、亚铁离子螯合能力及还原力分别达到（29.50±0.31）%、（73.33±0.62）%及0.50±0.01；二步消化后蛋白水解物羟基自由基清除率、亚铁离子螯合能力及还原力分别达到（55.88±0.94）%、（90.44±0.01）%及0.40±0.01。
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