After discharge from the hospital, the child should not be allowed to overeat because he or she is “starving”, nor should the child be “afraid” to eat enough because he or she continues to receive the same amount of food as during the hospitalization. For most of the children, they can basically be given 100% of the intake 5 days after surgery. At the same time, because of the growth needs and weight gain of the children, their meal quantity is gradually increasing, so it is impossible for the doctor to give parents very specific instructions when they are discharged from the hospital, such as how much milk to drink each time and how many times a day to eat. Don’t stay hungry”. They should not eat too much so as not to increase the burden on the heart, but not to fail to meet their basic physiological and growth needs. In addition, we should pay attention to the control of salt intake, such as excessive salt intake, can cause a large amount of water retention in the body, resulting in the child’s edema, liver enlargement, increase the burden on the heart, and in serious cases can lead to heart failure. Some parents blindly believe that their children should eat more fish and meat after surgery to replenish their bodies because they need protein to recover after surgery, but in fact, they should also give their children some fresh foods such as fruits and vegetables to replenish some vitamins. Eat less sweets, because the ratio of protein and fat contained in these sweets differs greatly from the normal needs of children, and if too much sweet food is consumed it is easy to cause indigestion, dry stools, loss of appetite, lack of protein and malnutrition in children, which will inevitably affect recovery. It is not advisable to eat more canned drinks and cold drinks. It is not advisable to blindly take tonic. The best post-operative “tonic” is natural food. Parents just need to follow the above-mentioned principles, pay attention to the meat and vegetables, coarse and fine balance in the child’s daily diet, pay attention to prevent the loss and destruction of nutrients when cooking, and ensure that the three meals a day are full and well eaten, the child will definitely recover as soon as possible. In addition, post-operative daily life should control the amount of activity appropriately, breathe more fresh air, keep a happy mood, do not scratch the incision, and review regularly after surgery. A follow-up visit to the hospital should be made after 3 months of discharge, and a full review should be made after one year to let the doctor know the recovery of heart function.