Congenital heart disease is a serious disease that endangers the health and even the life of children, and should be detected early and diagnosed clearly, which is essential to determine the timing and mode of surgery as early as possible. However, many children with congenital heart disease are generally “normal” after delivery, and there are no abnormal findings on examination by doctors, but they are only discovered by chance when they have a physical examination or suffer from other diseases later. Therefore, parents and relatives should carefully follow the doctor’s instructions to check the newborn baby after delivery and regularly go to the hospital for health checkups, and pay attention to the child from the following aspects: 1. 2.Whether the child has recurrent delirium 3, development is significantly slower than children of the same age, weight gain is slow, the body shape is thin, easy to sweat, if after excluding nutritional deficiency or rickets, it is highly likely to be congenital heart disease caused by cardiac insufficiency. 4.Shortness of breath, breath-holding, choking and refusal to feed often occur when breastfeeding, and there may be a bulge in the left precordial region of the chest, which are all manifestations of cardiac insufficiency. 5, there are often repeated episodes of upper respiratory tract infection, wheezing and hoarseness may occur in severe cases, and it is difficult to achieve results according to conventional anti-cold medicine treatment. 6.Elderly children are easily fatigued and have poor stamina and strength, and severe children may have cyanosis of the lips and swelling. 7.Congenital malformation can be seen in other parts of the body. When parents find any of the above symptoms and they do not improve for a long time, they should pay great attention to them and take their children to the hospital for X-ray chest X-ray, electrocardiogram, echocardiogram and cardiac catheterization, etc., to strive for early detection, early diagnosis and early treatment. The first visit is often to the nearest hospital or community clinic, and it is recommended to routinely perform an echocardiogram and to visit the local medical center again.