First of all, how to determine whether your baby is a “little fat”? In addition to regular medical checkups, parents need to regularly monitor the weight of their babies to determine whether they are in good nutritional condition or have reached the level of pediatric simple obesity. The height standard weight method is the method recommended by the WHO, which believes that height-specific weight is the best indicator to evaluate obesity in children before puberty (under 10 years old). This method is based on height, using the 80th percentile of the same height population as the standard weight of the height population. Greater than 20%-29% is mild obesity, 30%-49% is moderate obesity, more than 50% is severe obesity. BMI (body mass index method) and infant Kaup index can also be calculated, but this method is more suitable as a simple method to evaluate adult obesity. By the way to add the WHO definition of the standard is the adult BMI between 18.5-24.9 is appropriate range, BMI ≧ 25 defined as adults overweight, BMI ≧ 30 for adults obese. If we have a simple judgment or doctor’s diagnosis, it is clear that the baby has really become a “small fat pier”, then we should do? First of all, depending on the situation, if it is not serious, according to the following methods to adjust the feeding method and diet structure and appropriate increase in exercise and other methods to change; if it has been significantly serious or parents have nothing to do is recommended to combine professional child health institutions to guide the treatment. The principle of treatment: reduce the intake of caloric food and increase the consumption of caloric food by the body. The goal of treatment: to promote growth and development, improve physical health, develop scientifically correct and good habits, ensure the physical and mental development of children, and cultivate a new generation free of cardiovascular disease risk factors. Treatment measures: Diet adjustment is the key, reduce the three high (high heat, high sugar, high fat) diet, and adopt a food structure with moderate protein, low fat, low carbohydrate and high dietary fiber. Try to use bulky foods (such as celery, cucumber and apples) to ensure the supply of vitamins and minerals, especially the B vitamins that have the effect of promoting fat burning should not be missing. Develop good eating habits, drink soup before meals, slow down eating, eat in small bites, and eliminate snacks, especially sweets and high-calorie foods such as chocolate. The proportion of the material structure of the total calories provided: carbohydrates account for 40%-45%, fat accounts for 20%-25% and protein accounts for 30%-35%. The general principles of calorie control are as follows: daily calorie intake for infants under six months is limited to 110 Kcal/d per kg; for infants 6-9 months is limited to 90 Kcal/d per kg; for children under 5 years is limited to 600-800 Kcal/d; for children 5-10 years is limited to 800-1000 Kcal/d; For children aged 10-14 years, the daily calorie intake should be limited to 1000-1200 Kcal/d. The exact calculation can be done with the help of a professional nutritional therapist. Diet restriction is not only to achieve the purpose of weight loss, but also to ensure the normal growth and development of children, so it is not advisable to be too hasty at the beginning and make sudden weight loss, only to require control of weight gain, so that their weight drops to more than 10% of the average standard weight calculated for that length can be without strict control of diet. Appropriate exercise is the focus, to feel relaxed and happy after exercise as the principle. The amount of exercise and activity time should be maintained daily, and strenuous exercise should be avoided to prevent increased appetite. At least 45 minutes to an hour of exercise every day, a combination of aerobic and anaerobic exercise, choose to pan the body type of exercise, such as walking. Also parent-child aerobics, swimming and other exercises as well as games such as hide-and-seek and crab walk are good. Psycho-behavioral treatment, avoiding discrimination, giving encouragement, relieving mental burden, and supervising treatment. The basis of behavior modification is “three to be, three not to be, three proper”, that is, “to natural food, to balanced meals, to snack”, “no supplements, no partial food, no foreign fast food”. “eat properly, sleep properly, exercise properly”. Family members should reach a consensus, unify requirements and work together to achieve the goal.