Nowadays, because of the increasing number of factors affecting precocious heart disease, it is important to take care to prevent the possibility of having a child with precocious heart disease even if there is no family history of precocious heart disease and both parents are healthy. Many children are easily missed during fetal life or early childhood, so parents should pay attention to observe abnormalities in their children while feeding them. 1. Cyanosis: Cyanosis is a prominent manifestation of cyanotic congenital heart disease. It can persist after birth or gradually become apparent three to four months after birth, and is better evident in the lips of the mouth, finger (toe) nail bed, and the tip of the nose. The latent cyanotic heart disease (such as ventricular septal defect, atrial septal defect, arteriovenous ductus arteriosus) usually does not have cyanosis, but only in activity, crying, breath-holding or when suffering from pneumonia, the late occurrence of pulmonary hypertension and right heart failure can appear persistent cyanosis. 2, prone to respiratory infections: most congenital heart diseases are usually prone to repeated respiratory infections due to increased pulmonary blood, and repeated respiratory infections further lead to heart failure, and the two are often causal to each other and become the cause of death in congenital heart disease. 3, squatting: children with cyanotic congenital heart disease, especially successful children with tetralogy of Fallot, often appear squatting signs after activity, which can increase the body circulation, vascular resistance and thus reduce the right-to-left shunt generated by septal defect, and also increase venous blood flow back to the right heart, thus improving pulmonary blood flow. 4, pestle finger (toe): cyanotic congenital heart disease is almost always accompanied by pestle finger (toe) and erythrocytosis. The mechanism of pestle finger (toe) is not yet clear, Chu but erythrocytosis is a physiological response of the body to arterial hypoxia. 5, developmental disorders: children with congenital heart disease often develop abnormally manifested as cited thinness malnutrition stunted growth, etc. Other symptoms: congenital heart disease such as left atrial enlargement or pulmonary artery compression of the recurrent laryngeal nerve, since childhood hoarse cry, shortness of breath, cough; combined with other malformations, such as congenital cataract, cleft lip and palate and congenital stupidity; ventricular enlargement can lead to anterior heart area bulge, thoracic deformity; persistent cyanosis can be accompanied by pestle finger, mostly formed 1 to 2 years after the appearance of cyanosis. If parents find that their children have the above symptoms, they should go to the hospital as soon as possible to confirm the diagnosis of congenital heart disease, the common methods of examination are X-ray, electrocardiogram, echocardiogram, heart catheterization and cardiovascular angiography when the heart to be. Once the diagnosis of congenital heart disease is confirmed, you should go to the cardiac surgery department as soon as possible.