Objective To obtain the fat base value and the fat distribution characteristics of Tibetan teenagers in Tibet by counting their fat content with a bioelectrical impedance method.Methods We randomly selected 1427 healthy teenagers (710 males, 717 females) whose parents were Tibetan in Tibet.They had signed the informed consent.We detected all subjects with the body composition analyzer and concluded the total fat, and fat contents of the left upper limb (left lower limb and right upper limb, right lower limb, trunk), then worked out the body fat ratio, and fat ratio of the left upper limbs(left lower limb, right upper limb and right lower limb, trunk). All the results were analyzed with inputted SPSS(statistical software) and processed by independent sample t-test and variance analysis. Results The total fat mass, the fat mass of limbs and trunk in the male were less than that in the female in all age groups of Tibetan teenagers(P <0.05).In general,the fat content of Tibetan teenagers in Tibet increased with age, females’ increasing trend was more pronounced.Conclusion The fat characteristics of tibetan teenagers in Tibet are related with age and hormone secretion, which reflects the physiological characteristics in different developmental stages.