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目的:采用响应面法优化红参多糖的最佳提取工艺条件，研究红参多糖的抗氧化活性。方法:采用超临界COn 2萃取法提取红参多糖，考察料液比、萃取时间、萃取温度、萃取压力对红参多糖提取的影响。运用Box-Behnken Design法对红参多糖提取工艺进行优化，采用Logit法计算红参多糖对DPPH清除率的半抑制浓度（half maximal inhibitory concentration, ICn 50)，研究其抗氧化活性。n 结果:以红参多糖得率为评价指标，最优提取条件为萃取温度61.12 ℃、萃取压力20.64 MPa、萃取时间128.37 min、料液比1∶25.61 g/ml，红参多糖得率为36.89%。3组重复性试验结果显示，该条件下红参多糖得率相对误差在5%范围内。红参多糖质量浓度为25 μg/ml时有较好的抗氧化活性，ICn 50为10.97 μg/ml。n 结论:优化的红参多糖提取工艺条件合理可靠，红参多糖抗氧化活性较强，可为后续研究提供参考。“,”Objective:Response surface methodology was used to optimize the optimal extraction conditions of red ginseng polysaccharide and to study the antioxidant activity of red ginseng polysaccharide.Methods:Supercritical COn 2 extraction method was used to extract polysaccharides from red ginseng. The effects of solid-liquid ratio, extraction time, extraction temperature and extraction pressure on the extraction of polysaccharides from red ginseng were investigated. Box-behnken Design method was used to optimize the extraction process of red ginseng polysaccharide, and Logit method was used to calculate the semi-inhibitory concentration of red ginseng polysaccharide on DPPH clearance (half maximal inhibitory concentration, ICn 50).n Results:The optimal extraction conditions were as follows: extraction temperature 61.12 ℃, extraction pressure 20.64 MPa, extraction time 128.37 min, solid-liquid ratio 1∶25.61 g/ml, and the extraction yield of red ginseng polysaccharide was 36.89%. The results of three groups of repeatability tests showed that the relative error of polysaccharide yield of red ginseng was in the range of 5%. When the mass concentration of red ginseng polysaccharide was 25 μg/ml, it had better antioxidant activity and IC n 50 was 10.97 μg/ml.n Conclusion:The optimized extraction conditions of red ginseng polysaccharide were reasonable and reliable, and the antioxidant activity of red ginseng polysaccharide was strong, which could provide reference for the follow-up research.