The invention discloses a damping efficiency test platform, comprising a rack, vibrating sources, active damping devices, a detection device and a control device; the rack is used for simulating an object under control and is provided with a plurality of vibrating source mounting positions and a plurality of damping device mounting positions, the vibrating sources are used for exciting the rack to vibrate and are disposed at the vibrating source mounting positions, the active damping devices are used for relieving the vibration of the rack and are arranged at the damping device mounting positions, the detection device is used for detecting vibrational strength of the rack and includes a vibration sensor, the control device is used for controlling the vibrating sources and the active damping devices and receiving feedback of the detection device, the input end of the control device is communicated with the detection device, and the output end of the control device is communicated respectively with the vibrating sources and the active damping devices. The damping efficiency test platform can simulate vibrations under different strengths and frequencies, the active damping devices are debugged according to the different vibrating sources on the test platform, debugging at a mounting site is not required, and fewer spare parts and auxiliary devices are to be transported.