With the improvement of people’s living standards, obese children are increasingly coming into our attention. Type 2 diabetes is no longer the patent of middle-aged and elderly people, and the incidence of type 2 diabetes caused by obesity is increasing among children. The main cause of type 2 diabetes in children is unreasonable diet structure. Nowadays, most children like to drink and eat fried food, like to eat food binge, do not like the food do not eat, which happens to be the most prominent point of the bad lifestyle that induces type 2 diabetes. Coupled with the increase in private cars in modern society, children are transported to and from school, holidays are occupied by a variety of interest classes, these factors are leading to a reduction in children’s activities, more and more obese children. In particular, obesity leads to insulin resistance in the body, and blood glucose concentration increases day by day. The body needs to consume more insulin, and over time, diabetes is induced. Prevention of type 2 diabetes in children is important. Expectant mothers should strengthen genetic screening from pregnancy to delivery, and consume reasonable nutrition during pregnancy to avoid having an obese or low weight child. After the child is born, breastfeeding should be adhered to and supplementary food should be added reasonably, less high-calorie food should be eaten, moderate amount of protein and high-fiber food should be chosen, reasonable intake of various fresh vegetables, fruits, lean meats, fats, fish and mixed grains, attention should be paid to cultivating good eating habits of the child from childhood, the diet of three meals a day should be arranged reasonably according to the age of the child, so that the child will not be hungry and full, no partial food, avoid too greasy, fried food and too much precipitate classification. The child’s diet should be reasonably arranged according to the child’s age, so that the child is not hungry and full, not partial food, avoiding too greasy, fried food and too much precipitation classification food, and at the same time should limit sugar, snacks and drinks. Children should also be trained to exercise from an early age to burn off excess calories, so that the consumption of calories is roughly equal to the intake of calories. Parents must supervise, encourage and motivate their children’s interest in sports. Take your child outdoors often for exercise, such as swimming, running, soccer, hiking, dancing, etc. Choose sports according to your child’s age and physical strength. Exercise five days a week, at least thirty minutes a day. Promote one less elevator ride, one less bus stop, and less private car transportation. Exercise, nutrition, obesity prevention, weight reduction, health education, starting with children, let’s mobilize the whole society to pay attention to children’s health and stay away from diabetes!