Asphalt rubber (AR) was prepared in a routine way by using AC type continuous dense gradation to replace previous used broken gradation.AR mixture was used as stress absorption layer that is similar to Strata.Firstly,through design method of the target void the changes in grading was analyzed.Then,four point loaded bending fatigue test was conducted to study the influencing factors of fatigue performance and the design of AR mixture.Finally,compared with the ARAC 13 and Strata stress absorbing layer mixture and high addition SBS modified asphalt mixes,the road performances of AR mixture was determined.According to the study,the gradation with optimal porosity is obtained when the passing rate(by mass) for 475mm is 55%,that for 236mm is 10% and that for 118mm is 25% 30%.The increase of asphalt content and the reduction of the void fraction will enhance its fatigue life.Based on the study,it is recommended that penetration of 80 or so should be selected,and asphalt content(by mass) in asphalt rubber should be 9% 10%.Meanwhile,the mineral powder is not added in the mixture.The AR mixtures have the better fatigue performance and better stability at high temperature.Compared with other mixtures,AR stress absorbing layer mixtures has cost effective advantages.