Abstract: In order to describe the situation of tuberculosis infection in army, to provide reference for the control of tuberculosis.We have done PPD skin tests for 15469 armymen.The results show total positive rate is 34.31 persent.Strong positive rate is 3.21 persent. Compared with the results of the national survey in 1980, the po sitive rate dropped 44.96 persent.There are more distinguish among different army, including member, place w here troops rate dropped 44.96 persent.There are more distinguish among different army,including member, place where troops are stationed, and task to be charged.Patients in army, epidemic situation in the stationed places and intensity of training are the main facto rs for the increasing morbidity rate, which are also the emphasis to control.