The invention discloses a novel high-temperature resistant superoxide dismutase (SOD) and a coding gene and application thereof. The superoxide dismutase has a very high stability and activity under various severe conditions such as high temperature, high acidity or alkalinity and various proteases such as pepsin and trypsin. The superoxide dismutase of the present invention overcomes the problems of the existing SOD products, such as unstability, low in activity or even a complete lack of activity and prone to degradation and inactivation in the digestive tract. And the superoxide dismutase of the present invention is expected to be developed into cosmetics or health-care foods or to medicines which are stable in activity and have a good effect.