Dendrobium,as traditional Chinese medicine materials,has multiple species and wide distribution.Dendrobium have showed many effects such as enhancing immunity,antioxidant activity,antitumor,and nourishing yin.Antioxidant activity occupied an important position in pharmacological functions of Dendrobium.Numerous researches have revealed that the antioxidant activity of Dendrobium can inhibit the damage of active oxygen to the body,delaying aging,and preventing diseases.In order to providing the latest references for scholars,this paper reviewed the antioxidant activity of Dendrobium in three aspects,including Dendrobium species with antioxidant activity,methods for evaluation of antioxidant activity,and active ingredients and their mechanism.