Abstract: Experimental study on parameter optimization of the maximal influencing factor layer of alternately laminated anisot ropic damped st ructures was carried out with dynamic mechanical analyzer (DMA Q800) . The influencesof different orientation angles , thicknesses and multilayer substitutes of the main cont rolled const rained layer ontemperature and f requency characteristics of the st ructural stiffness and damping were discussed. The experimentalresult s show that the st ructural damping characteristics are better while the orientation angle of the layer is close to90°(including the laminating of two 90°layers) ,and the optimal thickness is different in different st ructures , andthe st ructural damping characteristic is better while the ratio of the total thickness of the damping layers to the maincont rolled anisot ropic layer is about 10.