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目的 了解1991-2014年西藏藏族7～18岁学生超重肥胖的长期变化趋势和流行现状,为藏族学生超重肥胖的早期预防和相关政策制定提供依据.方法 利用1991、1995、2000、2005、2010、2014年6次全国学生体质与健康调研资料,使用“1985年身高标准体重法”判断超重和肥胖,分性别、年龄描述藏族7 ～18岁学生超重肥胖的长期变化规律及流行现状.结果 1991-2014年间,藏族7～18岁中小学生超重、肥胖率呈现逐年增长趋势,由1991年的1.01％和0.42％分别增长至2014年的9.39％和6.95％,男、女生肥胖率分别从0.25％和0.59％增长至8.98％和4.90％,男生增长幅度约是女生的2倍;7～9岁、10～ 12岁、13 ～ 15岁、16 ～18岁肥胖率分别增长7.26、7.07、6.11和5.66个百分点,超重率分别增长11.07、10.84、6.42和5.15个百分点,越小年龄组超重肥胖率增长越明显,超重和肥胖呈现出明显的低龄化趋势,其中男生的肥胖低龄化趋势尤其明显.结论 西藏藏族学生超重肥胖率明显增加,需引起足够重视,应积极采取早期干预措施,尤以小学生、男生为重点干预人群.“,”Objective To explore secular trend of overweight and obesity prevalence among Chinese Tibetan students aged 7 to 18 years between 1991 and 2014,and to provide evidences for early prevention of overweight and obesity among the students and relevant policy making.Methods Based on the data from six waves of Chinese National Survey on Students Constitution and Health (CNSSCH)conducted in1991,1995,2000,2005,2010 and 2014,overweight and obesity among 7-18 years old Tibetan students were identified with the height-standardized weight method proposed by Research Group for Constitution and Health of Chinese Students in 1985.Secular trend and epidemic status of overweight and obesity among the students were described and compared by gender and age.Results From 1991 to 2014,the prevalence rate of overweight and obesity among the Tibetan students increased significantly from 1.01％ and 0.42％ in 1991 to 9.39％ and 6.95％ in 2014;the prevalence of obesity among the boy and girl students increased from 0.25％ and 0.59％ to 8.98％ and 4.90％,with a 2 times higher increase ratio for the boy students compared to the girt students.The increasing percentage of obesity and overweight prevalence rate were 7.26 and 11.07,7.07 and 10.84,6.11 and 6.42,and 5.66 and 5.15 for the students aged 7-9,10-12,13-15,and 16-18 years old,respectively,between 1991 and 2014.The students at younger ages presented higher increased prevalence of overweight and obesity than the students at elder ages,particularly for the boy students.Conclusion The prevalence of overweight and obesity among Tibetan students in Tibet increased significantly between 1991 and 2014 and early intervention measures should be implemented among the students,especially among the pupils and boy students.