Abstract: The deployment mechanism is comprised of a speed regulatorand a pair of hinges in which there are a spring motor and a latch foreach.The spring motor provides energy for deployment.The speed regulatorproduces damping to stabilize the deployment speed so as not to over shockat the movement termination.Qualification tests have been accomplished.No damage was appeared after vibration test and thermo-vacuum test.Thedeployment speed at 52.3℃ in vacuum is 14% higher than that at -20℃.A deployment repeatibility of 1 are minute was detected on a zero-G device.An estimation of the impact of some factors to deployment speed wasperformed with a calculation program.