Using elastic and isolating objects with scheme of passive control can efficiently control the high frequency vibration, however it generally invalidates in control of low frequency vibration especially under 5 Hz. Vibration control using smart-material actuators has been utilized in structural vibration control. The ability to deliver large forces, wide-band responses, precise and relatively large displacement has giant magnetostrictive actuator the great potentials in vibration, especially in the low frequency vibration control. In this research, a giant magnetostrictive actuator for low frequency adaptive vibration control has been realized and investigated. In order to avoid the quadric frequency effect on magnetostriction, and to realize control using linear harmonic signal, a permanent-biased giant magnetostrictive actuator is designed and constructed. In the meantime, a magnetostrictive adaptive control algorithm and a control system are realized. A self-tuning adaptive control method for the vibration control is proposed in comparison with the inverse feedforward-PID control which is fit to step response of GMA in previous work. The research into the actuator for low frequency adaptive vibration control is finally experimentally verified. It proves that giant magnetostrictive actuators may secure the applications in adaptive control of low frequency vibration.