Obesity is a global problem and poses a great threat to children's health. Obesity focuses on prevention. The main forming factors are unbalanced channels, excessive calorie intake and less consumption, and finally it becomes fat when stored. Obesity before the age of 3 is usually caused by overfeeding. At this stage, the focus is on preventing overfeeding. Usually, when children are full, they should not be given any more food. The baby's needs are various. Sometimes he needs an adult to play with him, someone to tease him, an adult to hold him, or a diaper to change when he is wet. Not all crying is for breastfeeding, so parents should correctly understand their children's signals, understand their language and prevent overfeeding and obesity. It is not too early to add solid food, some children add complementary food very early, and eating too much starch food is easy to get obese. /kloc-after 0/year-old, we should pay attention to promoting a balanced diet, eat more meat, eggs, fish and other foods, and do not recommend children to drink too much juice or sweet drinks. Don't eat after the child is full. Children are allowed to eat leftovers, not everything, to prevent obesity in the future. Encourage children to do more activities and exercise, and take children to do fitness exercises appropriately. Some children exercise too little, eat too little, and are prone to obesity. Obesity controls the diet of older children, reduces the intake of carbohydrates and fats on the existing basis, and ensures the intake of vitamins, cellulose and protein, step by step. On the existing basis, we should lose weight slightly, or keep the weight constant, and gradually achieve the dynamic balance of energy, so as to achieve the purpose of losing weight.