The existence of negative bending moment at the top of continuous beam bridge usually saws false seam.The concrete bridge deck and its asphalt pavement will produce transverse fatigue cracks under long-term driving load.In this paper,aiming at the prevention of reflective cracking on asphalt pavement,the structure and material of crack prevention are studied based on the composite stress absorption layer of geotextile+gravel asphalt seal.The properties of PP geotextiles were evaluated by means of DSC differential scanning calorimetry,TG thermogravimetric analysis and thermal impact test.Meanwhile,the Texas Overlay Test was used to study the anti reflective cracking performances of SAMI-AR and Composite Stress Absorption Layers.The results show that the polypropylene geotextile has a melting point of about 166 ℃,a glass transition temperature of about 16 ℃ and a thermal decomposition temperature of about 400 ℃,which retains good strength and deformability under a thermal shock of 180 ℃ with high high and low temperature performance and thermal impact resistance; using composite stress-absorbing layer can improve the pavement structure of low-temperature antireflective crack more than 5 times the capacity,deformation amplitude 2mm,room temperature 20 ℃ slightly better anti-reflective ability than rubber asphalt stress absorption layer SAMI-AR,with high prospects for promotion and application.