As surgeons have become more aware of tetralogy of Fallot and surgical techniques have gradually improved, radical surgery can be performed in most patients with tetralogy of Fallot, and symptom-reducing surgery has become rare. Radical surgery consists of two things: first, right ventricular outflow tract and pulmonary artery sparing; second, repair of ventricular septal defect. Satisfactory orthodontic correction during surgery is often the key to successful recovery from surgery. The choice of surgical methods: 1, simple intracardiac repair is suitable for cases with simple funicular stenosis and/or pulmonary valve stenosis and large outflow and pulmonary valve annulus as well as perimembranous ventricular septal defect and well-developed pulmonary artery, generally using a transverse right ventricular incision or right atrial pathway. 2. The surgical indications for applying a transvalvular right ventricular outflow tract patch are multiple pulmonary stenoses and subpulmonary ventricular septal defects. For leaky tubular stenosis, a subpulmonary or transvalvular right ventricular outflow tract patch can be done. Contraindications: 1. Poorly developed left ventricle and pulmonary artery should be preceded by palliative surgery and staged corrective surgery. 2.Persons with intractable heart failure and severe cardiac insufficiency who have failed medical treatment. 3, Those who have severe liver and kidney function impairment.