Abstract: ObjectiveTo evaluate current status of work stress and to explore its impact on sub-health among military pilots. MethodsA total of 500 military pilots were selected by using stratified cluster sampling method.A test on work stress and sub-health status was carried out with work stress scale and sub-health scale. ResultsThe average age of the pilots was 31±6.8 years and 48.4% of the pilots reported high work stress.The highest ratio of stress was for interpersonal relationship(68.6%).There were significant differences in stress of interpersonal relationship and working condition among the military pilots of different age(P<0.01);the pilots at the age of 30-39 years had the highest score in stress of interpersonal relationship(71.75±10.48)and the pilots at the age of 40-45 had the highest score of working condition stress(55.73±14.29);the scores of the pilots with the education of undergraduate or above for interpersonal relationship(68.47±10.30)and working interesting stresses(145.02±24.46)were higher than those of the pilots with junior college education(P<0.05).There were significant differences in interpersonal relationship among the military pilots with different marital status(P<0.05),with the highest score(69.01±10.39)in the married.The score of work stress correlated positively to the score of sub-health(P<0.01). ConclusionWork stress is an important risk factor for sub-health among military pilots.Relieving work stress is an important measure to prevent sub-health in pilots.