Abstract: Objective To analyze the epidemiological characteristics of our military fighter pilots with alternobaric vertigo by questionnaire. Methods Of the 250 pilots participated in the survey of alternobaric vertigo from January 2012 to December 2013, clinical data about 193 pilots were selected. The relevant factors of alternobaric vertigo, including its incidence, flight altitude, duration, induced factors and relationship between age and fight time, and past medical history were analyzed. Results Of the 193 pilots, alternobaric vertigo occurred in 40 pilots during fight with the rate of 20.72%. The vertigo symptoms showed during fying up or down with the height of 1 000 m to 3 000 m and the vertigo duration of 2 seconds to 2 minutes. Of the 40 cases, 8 cases (20%) had vertigo symptom associated with ear barotrauma; 14 cases (35%) had used the pressurized oxygen mask; 14 cases (35%) had vertigo symptom during doing fying stunts; 8 cases had used Valsalva maneuver which might induce vertigo symptom. The average fight time of 40 cases of alternobaric vertigo was 1 791.42±1 387.74 h, and the average fight time in the other 153 cases who did not have alternobaric vertigo was 1 425.39±1 266.31 h, statistically signifcant difference was found between them (P< 0.01). Conclusion The alternobaric vertigo shows a higher incidence in our pilots and it is associated with their fight time. Therefore, targeted air guard protection should be carried out.