Abstract: Objective To investigate the quality of life(QOL)and its influencing factors in military personnel in Tibet.Methods 490 military personnel in Tibet were assessed with WHOQ uality of Life-BREF and self-made questionnaire of influencing factors.Results Scores in all domains of QOL of the subjects were 64.50%13.91,59.25%15.11,59.64% 17.82,49.42%15.23 respectively,and the score in environmental do main lower than average.Level(50)was lowest;General evaluation of QOL and health condition were most at the common or better level.There were significant difference in scores of one or more domains of QOL in military personnel with different zone,times of entered Tibet,individual identit y,marriage state(P<0.05);Most domains of QOL were significantly correlated(P<0.05)with factors such as age,time of service and entering Tibet,economic condition,employment in the future,work intensity,touch with outside world,relation with family,affiliation with opposite sex,and at a=0.05 level,except for the factor of age,other factors were all entered multiple reg ression equation.Conclusion The QOL in military personnel in Tibet should be improved,especially in the environmental domain.The QOL was influenced by sociological factors such as zone,times of entered Tibet,individual identity,marriage state,economic condition,employment in the future,work intensity,touch with outside world,relation with family,affiliation with opposite sex,and so on.