Abstract: Music can be enjoyable, and improve person's mental state. Music therapy is a kind of adjuvant therapy including music, psychology, and medicine, widely used in the feld of medical and psychological treatment. Music therapy has an irreplaceable role in the treatment to nervous system diseases, cardiovascular system diseases. It can improve emotional wellbeing, reduce pain in the surgery, relieve cancer patients' discomfort, and improve sleep quality. However, there still remains some problems in its application, which need further studies.