Flight vibration data is analyzed for the flight test, and the posterior distribution types are derived from flight vibration data. Based on the measured data and the current national military standards for flight-qualification random vibration tests, the vibration qualification test area under different state spectrum induction methods is put forward. According to the proposed method, the actual aircraft vibration environment spectrum is obtained and compiled, which lays the foundation for the reliability assessment of vibration environments in this type of aircraft equipment.