The treatment of simple obesity in children is a long process, because children are in the stage of organism growth and development, therefore, it is forbidden to use weight loss drugs, surgical treatment and physical therapy such as steam bath and shock, and it is not advocated to lose weight quickly in the short term, but to start from diet, exercise and psychology, which is beneficial to the growth and development of children and can effectively control the weight growth of children. 1.Develop intervention treatment plan Develop corresponding intervention treatment plan for children with mild, moderate and severe obesity according to the results of assessment. According to the family conditions, school situation, children’s different eating habits and hobbies to develop a comprehensive intervention treatment plan such as diet program, exercise prescription, behavior correction program, etc., so that parents and teachers participate, and monthly feedback from parents to doctors on the treatment situation, and timely adjustment and correction of deviations. 2.Dietary adjustment According to the characteristics of growth and development of each age group to develop a diet plan, individualized formulation of the total caloric energy and the intake of the three major nutrients of the child. The principle of dietary adjustment is a balanced diet with low energy, i.e. to ensure the intake of protein, vitamins and minerals under the condition of low energy intake. General recommended daily caloric intake: energy is generally limited to 2510-3340kJ/d (600-800kcal/d) for under 5 years old, 3340-4180kJ/d (800-1000kcal/d) for 5-10 years old and 4180-5020kJ/d (1000-1200kcal/d) for 10-14 years old. The upper limit of the above treatment plan was taken for mild and moderate obesity, and the lower limit was taken for severe obesity. The caloric energy of 3 meals in the morning, middle and evening accounts for 25%, 40% and 35% of the total caloric energy respectively. The weight ratio of meat to vegetarian is 1:2, try not to eat late night snacks, reduce high-calorie foods such as staple foods, sweets and fried foods, ensure sufficient supply of high-protein foods such as fish, lean meat, milk, eggs and tofu, and increase the proportion of vegetables and fruits in the dietary structure. Note: ①The ratio of carbohydrate, protein and fat to total calories is 45:35:20. Carbohydrate should be the main food and sugar should be limited. ②Protein should not be less than 2g/kg/d, and fat is strictly limited, especially animal fat. ③Check the nutrient content of food regularly and ensure the supply of vitamins and minerals. ④Satisfy appetite. Avoid starvation and choose bulky, low-calorie foods, such as coarse rice, coarse flour, vegetables containing fiber (bok choy, celery, lettuce, radish, etc.), and fruits. Meals should be eaten in small amounts several times, 3 to 5 meals. ⑤ The distribution of calories should be enhanced for breakfast and lunch and reduced for dinner. Meals should start with soup or a small amount of water, slow down the speed of eating and increase the number of chewing. The control of diet should be gradual and different from person to person. At the beginning, it is only required to stop the abnormal growth of weight, and after adapting to the diet control, the weight can be further reduced gradually, but when the weight reaches only 10% or so above the normal weight range of children of the same age, it means that the diet control is effective, and the food can be not strictly restricted on the basis of the existing diet. 3, behavior correction Many obese children have the following bad habits: (1) love to eat high-calorie food (such as fried food, ice cream, etc.) or eat meat not vegetarian; (2) eat too fast, too many meals or have the habit of eating before bed; (3) watch TV for a long time, more than 2h a day, and at the same time eat snacks; (4) exercise less, love to sleep. The above bad behavior and habits cause children to consume too much and consume too little, fat accumulation leads to obesity, so parents need to supervise the use of targeted behavior correction methods, the purpose is: (1) adjust the diet structure of meat and vegetables with the right mix; (2) slow down the speed of eating, to chew slowly; (3) reduce the time to watch TV and use the computer time less than 1h per day is appropriate; (4) control snacks, do not eat late night snacks; (5) more exercise, can be based on the number of snacks and snacks. (5) Exercise more, you can choose sports according to children’s preferences and cultivate interest in sports. Exercise training Adopt aerobic exercise suitable for obese children’s environment, such as swimming, running, brisk walking, climbing, rope skipping, stair climbing, ball and other sports that move the body, in 2 parts, the first part is under the guidance of teachers, doing morning exercises or recess exercises for 10-20min every morning, and participating in sports for 30-60min in the afternoon, the intensity of exercise should reach 120-140 times/min as the standard The second part is to train in the evening every day under the supervision and accompaniment of parents, 30-60min, with a self-determined exercise mode, with a heart rate of 110-130 beats/min, which can be done intermittently. The exercise style can be changed, and the game can be combined with exercise training. Positive reinforcement behavioral therapy, such as giving appropriate material and mental rewards, is used to encourage children to adhere to the exercise training to ensure the effect of exercise.