Abstract: Plants are always suffered from physiological or non-physiological stress with different degrees in growth and development, which results in the production of numerous ROS affecting normal growth and metabolism of plants and even causing senescence and death. Numerous studies have shown that the superoxide dismutase of plants can exert its unique effect to remove a serious of ROS effectively so as to maintain plant′s ordinary life activities, and it has been widely applied in agriculture, medicine, food and chemical industry. We introduced the distribution, category, physical and chemical properties, physiological functions and progress on research and application of one of the most import members in antioxidant enzyme systems of plants-superoxide dismutase.