Objective  To understand the prevalence of sarcopenia,sarcopenic obesity and osteoporosis, and to analyze the influence of sarcopenia and sarcopenic obesity on osteoporosis.     Methods  After all the people signed the informed research agreement, the experimental subjects were selected from Han people over 20 years old in Liaoning region, and a total of 1266 cases were included. The distribution of muscle mass, fat mass and bone mineral density in different parts of adults were measured by bioelectrical impedance analyzer (BIA) and bone densitometer, and the correlation between sarcopenia and sarcopenic obesity and osteoporosis in adults was studied.     Results  With the increase of age, the muscle mass of limbs, trunk, total muscle mass and body weight of the Han adults in Liaoning showed a trend of increasing at first and then decreasing. There was no significant difference in the prevalence of sarcopenia and sarcopenic obesity between men and women, but there was a significant difference in the prevalence of osteoporosis between men and women. The prevalence of all three groups reached the peak in the age group above 60, and the difference was statistically significant.The risk factor for osteoporosis was sarcopenia and sarcopenic obesity.     Conclusion  Among adults of Han nationality in Liaoning, the prevalence of sarcopenic obesity,sarcopenia and osteoporosis is significantly different in age. Bone condition is affected by fat mass and muscle mass.