Due to the improvement of people’s living standard, the incidence of childhood obesity is gradually increasing. Obesity not only affects the appearance image and psychology of children, but also becomes the cause of hypertension, heart disease, gallstone disease, gout and other diseases and even sudden death in adulthood, and the prevention and treatment of obesity should attract the attention of society and families. Childhood obesity is the risk factor of adult obesity, generally 10-20% of obese infants will become obese children, 40% of obese children will become obese adolescents, and up to 75-80% of obese adolescents eventually become obese adults, so concern about obesity in adulthood should start from childhood. Obesity is divided into simple obesity and secondary obesity, accounting for about 95% – 97% of obese children are not accompanied by obvious endocrine, metabolic disease that simple obesity, and the following factors: excessive nutrient intake, too little activity, genetic factors, mental trauma, low academic performance, psychological abnormalities and other factors. But about 3-5% of obese children secondary to various endocrine diseases and syndromes. Commonly obesity as the main manifestation of the disease are: 1, Prader-Willi syndrome (is around the type of obese body, short stature, low intelligence, small hands and feet, low muscle tone genital hypoplasia); 2, Laurence-Moon-Biedl syndrome (around the type of obesity, intelligence mildly low, retinal pigmentation, multi-finger toe, hypogonadism); 3. Alstrom syndrome (central obesity, retinitis pigmentosa, blindness, neurological deafness, diabetes); 4, obesity reproductive incompetence (Froehlichsyn.) (the disease is secondary to hypothalamic and pituitary lesions, its body fat is mainly distributed in the neck, submandibular, breast, lower limbs, perineum and buttocks, fingers, toes appear slender, short stature, delayed or non-development of secondary sexual characteristics); 5, other endocrine diseases: adrenocortical hyperplasia, hypothyroidism, growth hormone deficiency, etc., all have their own characteristics, and further clinical examination is needed to differentiate. Obesity diagnostic criteria: the weight of children exceeds the average value of normal children of the same sex and height by 20% ↑ can be diagnosed. 1, height standard weight method: the same height of the 80th percentile of the population as the standard weight of the height of the population. More than 20%-29% is mild obesity; more than 30%-39% is moderate obesity; more than 40%-59% is severe obesity; more than 60% is extreme obesity. Diagnosis must be distinguished from secondary obesity diseases. 2, body mass index method (body mass index, BML) that: weight (kg) / height of the square (m2) BMI ~> 24 for Chinese adults overweight BMI ~> 28 respectively obese diagnostic standards. Excessively obese children, often appear some complications: diabetes, hypertension, hyperlipidemia, gastrointestinal diseases, poor pulmonary ventilation, joint lesions, psycho-psychiatric disorders, adult hyperlipidemia coronary heart disease, etc., so the discovery of children obesity should be promptly to the relevant medical institutions for further examination to clarify is simple obesity, or symptomatic obesity, if necessary for further treatment!