The utility model discloses a three -dimensional compound vibration isolator of shape memory alloy, including the inner tube and the lower flange base of coaxial setting, inner tube and lower flange base upwards pass through multilayer shape memory alloy stranded conductor fixed connection in the footpath, and inner tube and lower flange base are equipped with upper and lower friction plate in the axial, still including last flange, go up flange center department and are equipped with the guide pillar, and the guide pillar stretches into the inside of inner tube and matches with the inner tube, tangible form shape memory alloy spring is established to the inside axial of inner tube, and shape shape memory alloy spring contacts with the top of guide pillar, go up between flange and the inner tube through vertical power consumption device looks fixed connection, vertical power consumption device includes flange and attenuator lower flange on a cylindric lead core attenuator of compriseing sheetmetal, lead core, the attenuator. Utilize plumbous heart attenuator and upper and lower friction plate to reach level and vertical power -wasting effect, improved the stability of vibration isolator.