Waist circumference is an important index to measure a person's obesity, and it is a comprehensive index to reflect the total fat and fat distribution. The correlation between this index and abdominal visceral fat accumulation is better than waist-hip ratio. The World Health Organization recommends that men's waist circumference >: 94cm and women > 80cm as obesity standards, but this standard is more suitable for Europeans and Americans. For people in the Asia-Pacific region, including China, it is recommended to adopt men with waist circumference >; 90cm, female > 80cm is more suitable as the standard of obesity. However, domestic studies also show that the waist circumference of women in China >: 85cm may be a more appropriate standard, and the controversy in this area needs more research data to support it.