Asphalt binder is one of the important factors affecting the performance of pavement asphalt mixture.In order to obtain asphalt binder with excellent performance,CMK-50 emulsifier and JR65 SBR latex were used to emulsify and modify 70# asphalt matrix,and SBR modified emulsified asphalt was obtained, and the performance of modified emulsified asphalt was evaluated by three indexes of asphalt and storage stability.It is concluded that SBR modified emulsified asphalt has good temperature sensitivity,cohesiveness and storage stability,which can be widely used in the preparation of asphalt mixture.The apparent morphology of ordinary Portland cement emulsified asphalt slurry was studied by Scanning Electron Microscope (SEM).The results show that SBR modified emulsified asphalt slurry containing 4% cement has the best dense three-dimensional network structure, and the resulting mixture has the best intensity, thus having the best quick-drying effect.