Organic montmorillonite (OMMT) /crumb rubber compound modified asphalt was prepared via melt blending,and the microstructure of the product was characterized and analyzed by means of XRD and AFM.More-over,the physical properties,thermal oxidative aging properties and thermal storage stability of the product were in-vestigated.The results show that (1) the dispersion of crumb rubber in the modified asphalt becomes more uniform and an exfoliated structure forms due to the doping of OMMT; (2) as compared with the crumb rubber modified as-phalt,OMMT/crumb rubber compound modified asphalt is of improved high- temperature performances,for in-stance,with the increase of OMMT dosage,the softening point sharply increases,and the penetration (25℃) and the ductility (5℃) both decrease; and (3) after the doping of OMMT,both the thermal oxidative aging properties and the thermal storage stability of the compound modified asphalt improve significantly.