Currently there are a variety of standard weight conversion, in accordance with the international common way of calculation, male weight = [height (cm) – 105] * 0.9, to get 1.71cm men’s standard weight of 59.4kg; in accordance with the BMI index projection, BMI = weight (kg) / [height (m2)], the normal range of the BMI in the 18.5 ~ 23.9, resulting in a 1.71cm man weight The range should be 54.1~67.3kg. It is generally recognized that ideal body weight ± 10% range is normal; more than 10% to 20% of normal is overweight; less than 10% to 20% of normal is emaciation. Obesity is a chronic metabolic disease caused by the interaction of genetic factors, environmental factors and other reasons; if the patient’s weight is within the normal range, there is no need for special treatment, and only need to maintain a normal diet and lifestyle; if the patient belongs to the obese group, it is necessary to change the lifestyle, develop good dietary habits, and increase physical activity. Patients who are found to be overweight are advised to reduce their weight scientifically under the guidance of a doctor.