Mechanical performance of several crumb rubber modified asphalt concrete(CRMAC) mixtures with different use level of crumb rubber was investigated.Noise reduction mechanism of rubber modified asphalt concrete was analyzed.Also the noise reduction effect of experiment pavement was tested.It is found that the addition of crumb rubber has littile effect on sound absorption.Its main noise reduction mechanism for rubber modified asphalt concrete is damping effect.It is found that the CRMAC pavement performance such as deformation performance decreases with the increase of mixed crumb rubber amount.Rock modified asphalt has a little contribution to the improvement of mechanical performance,and a little contribution to vibration reduction for pavement.