Abstract: Basing on modal shape data, the aero-damping analysis method has been constructed with quasi-steady aerodynamics theory. The dynamic derivative experiments for a rigid model have been accomplished simultaneously for verification and validation of the present method. Then the computation of aero-damping and characteristics analysis have been carried out under the assigned conditions. It can be concluded that the method can be used for aero-damping analysis of spike, and all results are positive in research, which will repress the vibration of the system. There are some factors leading to negative aero-damping, and the factors have different contributions to the aero-damping values.