Abstract: To simulate more realistically the time history and the compound characteristics of the re-entry flight overload and the vibration environment in the ground test, an experimental study is proposed by combining the variable RMS random vibration test and the variable centrifugal acceleration test, on two re-entry vehicle subsystems. The variable centrifugal acceleration test conditions are derived from the nominal trajectory with smoothing and resampling. The vibration test conditions are based on the flight test data with the normalization and the weighted fusion of the frequency spectrum. The results of the new combined environmental test show that this test method is feasible for reproducing simultaneously the acceleration and vibration time history during the re-entry process.