The diet of children with precocious heart disease after surgery is basically the same as that of ordinary children, but still has its own special characteristics. The main components of salt are sodium and chloride, and sodium has the role of “hydrating” tissue in the body, and most of the sodium and chloride in the body are excreted from the urine. High sodium concentration in the blood can cause retention of large amounts of water in the body, resulting in general edema, liver enlargement, and increased burden on the heart, which can lead to heart failure in severe cases. At the same time, excessive salty diet is also one of the important causes of hypertension. Therefore, the diet of children with congenital heart disease after surgery must be lighter, salted products, salted eggs, salted fish and other foods containing too much salt should not be eaten as much as possible. 2, should not eat more sweets after heart surgery, when children do not want to eat, many parents like to stuff chocolate to children to eat, thinking that this can ensure nutrition. In fact, the main components of chocolate are fat and sugar, which are very high in calories, but the ratio of protein and fat contained in it differs greatly from the normal needs of children. Eating more chocolate is likely to cause indigestion, constipation and loss of appetite in children. At the same time, chocolate contains caffeine and other ingredients, too much consumption will not only make children overexcited, affecting rest, but also on the brain development of children bring certain adverse effects. 3, it is not advisable to eat more drinks and cold drinks Currently, the market is sold in a wide variety of canned beverages, many drinks are mainly composed of sugar or saccharin, spices, coloring and water, but often insufficient nutrition. Cold drinks are also popular among children, but the digestive organs of children after major surgery are still in the recovery and adjustment stage, and the digestive function of children is often weak at this time. Too cold food into the stomach will stimulate the gastric mucosa vasoconstriction, gastric juice secretion is reduced, affecting the digestive process of food in the gastrointestinal tract, but also weaken the bactericidal ability of the digestive tract, resulting in infectious diseases of the gastrointestinal tract. 4, should not blindly tonic Some parents believe that ginseng has a tonic effect, so they give post-operative children to drink ginseng soup. Ginseng does have the function of strengthening the heart and body, replenishing qi and generating fluid, but different ginsengs have different properties, and improper consumption may cause symptoms such as loss of appetite, nose bleeding and restlessness. There are also some supplements that are not suitable for children during their growth and development.