Objective:To study the variation of skinfold thicknesses of Tunbu adult with increased age,and the differences with other ethnic groups in China. Methods:Using the random sampling method, we investigated 6 items of skinfold thickness(including facial,triceps,biceps,subscapular,suprailiac and calf skinfold thickness) of 506 cases of Tunbu adults(251 males and 255 females) in area of Anshun Sichuan, and analyzed the variation features that the skinfold thickness varies with increased age. Results:Male Tunbu subscapular skinfold was thickest,biceps skinfold was thinnest,subcutaneous fat thickness of body was thicker than the limbs. Female Tunbu triceps skinfold was thickest,biceps skinfold was thinnest. All of the 6 items of skinfold thickness were greater in female than male,and had no clear correlation with age in male (P > 0.05),only facial skinfold had positively correlated with age in female (P < 0.01). Variance analysis of 6 items of skinfold thickness in 5 age groups of male and female showed suprailiac skinfold was statistically significant within age groups only in male(P < 0.01). All of the 6 items of skinfold thickness of Tunbu were greater than ethnic groups in southern China. Conclusion:Tunbu subcutaneous fat development has a big difference with South Asian ethnic group,while relatively close to other Han ethinc groups,particularly close to Han(Sichuan),Han(Jiangsu),Han(Anhui) and Buriats.