1, small ventricular septal defect, asymptomatic, small fractional flow, or no trend of pulmonary hypertension in follow-up surgery can be postponed to preschool age. 2, medium and large ventricular septal defect, accompanied by more serious symptoms of pulmonary congestion, and chronic cardiac insufficiency, prone to pulmonary hypertension, early surgery is advocated. The general age of surgery is between 6 months and 2 years to prevent the occurrence of irreversible pulmonary vascular lesions. For less than 6 months, with severe congestive heart failure and recurrent whistling infections, which cannot be controlled by drugs, surgery should be promptly corrected. 3, pulmonary subvalvular septal defect with aortic valve prolapse, advocate early surgery to prevent valve prolapse aggravation, resulting in aortic valve closure insufficiency. The appropriate age for surgery is before four or five years old. 4, intracardiac shunt appears right to left shunt, clinical cyanosis, that is, Eisenmenger’s syndrome, pulmonary vascular bed has occurred irreversible lesions, should be a contraindication to surgery.