Abstract: The research status of damping mechanism on magnesium and magnesium alloys at room temperature is reviewed. Considering the phenomenon of greater error between damping model and measured data at present, the paper illuminates that the G-L model is an important foundation of studying damping mechanism, but it can′t interpretate the damping mechanism completely. Aiming at this problem, taking the damping model of magnesium alloy vibration deformation process as a target, using the variation pattern of quantity and morphology of inner dislocation during vibration deformatin progress as a cutting point, the variation pattern of magnesium alloys inner energy variation caused by dislocation as research thoughts, the model of damping mechanism of magnesium alloys was established.