Small children are affected by certain diseases that cause them to be noticeably thin compared to normal children. Obviously thin children is one of the clinical symptoms of congenital heart disease. Infants and young children with congenital heart disease are significantly behind the development of children of the same age, manifested by thinness, malnutrition and developmental delay. Congenital cardiovascular disease is the most common type of congenital malformation. With the progress of cardiac diagnostic methods and surgical treatment techniques, the vast majority of congenital cardiovascular disease can now obtain a clear diagnosis and surgical correction treatment, and the prognosis is significantly improved compared with the previous. Dietary considerations for pediatric apparent thinness: 1, congenital heart disease diet should pay attention to breastfeeding as far as possible, and take a small amount of multiple meals, on-demand breastfeeding. 2, congenital heart disease children’s diet should be fed in sections, can not be fed too much at a time, in the middle of the rest and exhaust should be given several times. 3.Feeding is best to hold and feed, take half-sitting position of 45 degrees, and cyanotic children take knee-chest position (knee close to the chest), which helps to increase the sucking force, more digestive, and the baby is not easy to get tired. 4, congenital heart disease diet should pay attention to breastfeeding at any time to pay attention to the baby’s condition, such as cyanosis, breathing too fast, immediately stop feeding. 5, after feeding, should pat the back exhaust, to the right side of the lying position, elevate the head of the bed and observe whether there is milk spillage. 6, congenital heart disease diet should pay attention to spit up when dealing with: first of all, the child’s head to one side, gently pat his back, so that the remaining milk in the mouth out to prevent choking caused by aspiration pneumonia, and clean the mouth. 7, congenital heart disease diet should pay attention to the phenomenon of choking infants can be fed cake dry powder, so as not to choke the milk into the trachea, resulting in asphyxia. Vomiting or sweating a lot of frail infants can be fed by nasal feeding method.