Children’s BMI is also known as body mass index, the specific standards in different age stages there are some differences, but usually, BMI = 18.5 ~ 23.9 is a normal weight. The formula for calculating children’s BMI is based on weight divided by height squared, and under normal circumstances, a child’s BMI will not exceed 24. BMI=18.5-23.9 is normal weight; BMI=24.0-27.9 is overweight; and BMI≥28.0 is obese. Children with high BMI values may cause complications such as diabetes, hypertension, precocious puberty, etc. Therefore, when abnormalities are detected, it is necessary to go to the hospital in time for relevant examinations, and actively deal with and treat them. Such as changing bad habits, adjusting diet, and increasing exercise appropriately.