With the arrival of the third wave of cognitive behavioral therapy， more and more mindfulness-based psychotherapy has been applied to social anxiety disorder. Mindfulness-based psychotherapy mainly includes mindfulness-based stress reduction therapy， mindfulness-based cognitive therapy and acceptance and commitment therapy. Some studies have shown that mindfulness-based psychotherapy can reduce symptoms of social anxiety and increase self-esteem， mindfulness skills， and mental flexibility. In this paper， the definition of mindfulness， the introduction of mindfulness therapy and the application of mindfulness therapy in social anxiety disorder are illustrated.