Congenital heart disease is one of the most common congenital anomalies in children, which include ventricular and interventricular septal defects, patent ductus arteriosus, pulmonary valve and aortic valve stenosis, tetralogy of Fallot, and large vessel misalignment. Most children are diagnosed at birth with a heart murmur, and some are diagnosed early due to symptoms such as cyanosis and dyspnea. About 1/2 of the children with precocious heart disease die within one year after birth due to severe cardiac malformations. Survivors develop recurrent respiratory infections and developmental disorders throughout their developmental years. In mild cases, the early stage may be asymptomatic, but the presence of precordial murmur will affect the child’s schooling and employment, and if left untreated, will eventually lead to pulmonary hypertension, heart enlargement, heart failure, some complications of endocarditis, embolism, hemorrhage, hypertension and life-threatening, bringing a heavy mental and economic burden to the family. In recent years, the domestic diagnostic and surgical technology of precardiac disease has developed rapidly, and most of the precardiac disease can be diagnosed through auscultation and cardiac ultrasound, and the success rate of surgical correction in experienced hospitals has reached 95%. A large number of clinical studies have shown that surviving children can participate in normal school and general sports activities, and have a near-normal or normal quality of life. However, there are some children who delay seeking medical attention due to parental negligence, so that the disease has reached an advanced stage, or lost the opportunity to operate, or complicate the cardiopulmonary insufficiency, increasing the risk of surgery. For this reason, parents are reminded to: 1, take their children to the hospital as soon as possible to check the nature and extent of the heart deformity, to determine the appropriate age for surgery, so as not to hold the idea of “wait until they are older to cure”, delaying the disease. 2, to have a heart murmur but no symptoms of children, but also can not be negligent, should be regular physical examination, including chest X-ray, electrocardiogram, to understand the changes in murmurs and cardiopulmonary load. If necessary, consider surgery to prevent endocarditis and other complications. 3, for children who need to wait for surgery due to age or other factors, we should pay attention to prevent colds, train their brushing habits, and maintain oral hygiene. Tooth decay and tonsillitis should be actively treated. If there is a long-term fever that does not go away, consult a doctor as soon as possible. Avoid strenuous physical activities, so as not to increase the burden on the heart and lungs.