With the development of medical technology, more and more congenital heart diseases can be treated by interventional therapy to achieve the same curative effect as surgery, in addition, compared with surgery, it has the following unique advantages: 1. For children, interventional treatment makes the chest scarless without affecting the aesthetics, avoiding unnecessary trouble in future schooling, employment and even marriage, and is conducive to the cultivation of self-confidence in children with congenital heart disease. 2.Low complications and high safety. It completely avoids complications such as residual leakage of atrial and ventricular septal defects and recanalization of arterial catheterization in some patients after traditional open-heart repair. 3.Short hospital stay and fast recovery after surgery. The operation time of arteriovenous catheterization, atrial septal and ventricular septal defect closure takes 1~2 hours. The next day the patient can go down to the floor and resume normal life. After 3-7 days of observation, the patient is discharged from the hospital and can resume normal study and work. The average hospital stay is 5 to 10 days. 4. Long-term treatment effect is good. One month after the blocker was implanted into the heart, the body’s own endothelial cells covered its surface, and after 3 months the endothelial cells completely encapsulated and fixed the blocker. After more than 10 years of follow-up observation, patients with congenital heart disease treated with interventional therapy are completely restored to health, their growth and development are not affected, and they are able to work, study and live like healthy people; marriage and childbirth are not affected.