Different dosages (0.15%,0.25%,0.35%) of polyester fiber were mixed into the asphalt concrete AC-13 to compare and analyze the change laws of the pavement performance, strength fatigue performance and surface performance of rubber modified asphalt concrete with the polyester fiber content.The results show that the performance of the asphalt concrete AC-13 is significantly improved with the increase of polyester fiber content. When the polyester fiber content is 0.20%,most of the performance indexes reach the peak, and then gradually decline with the continued addition of polyester fiber,which indicates that excess polyester fiber can increase internal defects of the asphalt concrete AC-13.