Aim To study the in vitro and in vivo an-tioxidant activity of Inula nervosa wall. in order to le-gitimately use the resources of I. nervosa. Methods The medicinal ingredients of aboveground and under-ground parts of I. nervosa were extracted by different extraction methods. Ultrasonic extractions from differ-ent parts were compared by their in vitro and in vivo antioxidant effects. Results Ultrasound alcohol ex-traction had the highest content of total phenols and fla-vonoids, with the content of total phenolics much high-er than that of total flavonoids. Ultrasound alcohol ex-tractions had very good scavenging effect on DPPH, ABTS and superoxide anion radical, with the extraction from underground part more effective than extraction from aboveground part. Ultrasound alcohol extractions significantly increased the level of catalase ( CAT), superoxide dismutase (SOD), total antioxidant capaci-ty (T-AOC), glutathione peroxidase (GSH-Px) activi-ty and decreased the level of malondialdehyde (MDA) in liver, kidney and serum in drenching aging mice. The antioxidant activity of high concentration of the ex-traction from aerial part was equivalent to that of low concentration of the extraction from underground part. Conclusions Ultrasound alcohol extractions of I. ner-vosa have very good scavenging effect on free radicals, which indicates good antioxidant ability. Antioxidant activity of underground part is much stronger than that of the aboveground part.%目的：为合理利用显脉旋覆花资源，研究了显脉旋覆花体内外抗氧化作用。方法通过水煎法、索氏醇提法及超声醇提法对显脉旋覆花地上及地下部分药用成分进行提取，并通过体内外实验比较了不同部位超声醇提物的抗氧化效果。结果超声醇提所得总酚及总黄酮含量最高，提取物中总酚含量明显高于总黄酮含量；显脉旋覆花超声醇提物对DPPH、ABTS 及超氧阴离子自由基都有很好的清除效果，地下部分提取物的清除效果明显优于地上部分；提取物灌药可明显提高 D-半乳糖致衰小鼠肝脏、肾脏及血清的过氧化氢酶(CAT)、超氧化物歧化酶(SOD)、总抗氧化能力(T-AOC)、谷胱甘肽过氧化物酶( GSH-Px)酶活性，并降低丙二醛(MDA)含量，地上部分高浓度抗氧化效果相当于地下部分低浓度的效果。结论显脉旋覆花醇提物对自由基有良好的清除作用，具有较好的抗氧化能力，地下部分抗氧化的效果明显高于地上部分。
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