Abstract: The spacecraft is affected by both the random excitation and the acoustic excitation during launch and high-speed flight. However, in the ground testing program, a single environment test of vibration or acoustics is chosen to simulate the complicated environment, with an insufficient exposure of the flaws of the test product. Therefore, this paper compares the vibro-acoustic environment test, the acoustic test and the random vibration test of a spacecraft antenna. It is shown that the structure response is excited insufficiently in the low frequency region in the acoustic test and is attenuated in the high frequency region in the vibration test. As a result of the acoustic and vibration coupling effect, the structure response is restrained in the high frequency region in the vibro-acoustic environment test.