Abstract: In this paper, the vibration environment in the cabin of a civil aircraft is obtained through the flight test. The measured acceleration is weighted at frequency, so as to obtain the overall vibration magnitude characterizing different positions and different flight states in the same position. First, select the glide flight status and compare the vibration of the z-axis direction（vertical direction） of the seat surface and the x-axis direction of the seat back in the cockpit, the front row of the cabin, the middle row of the cabin and the rear row of the cabin. Second, the z-axis direction of the front row seat surface is used as an example to compare the vibrations in different flight states. The results show that the frequency distribution and corresponding amplitude in the z-axis direction of the seat surface measured at different positions are quite different. The amplitude corresponding to the maximum frequency component is different. In different flight states, the vibration level at the same location also varies greatly.