Abstract: In order to reduce the adverse effects of large-scale use of fossil fuels on the environment, make full use of renewable resources, and improve the defects in the road performance of traditional petroleum asphalt, a kind of biomass asphalt with the advantages of renewable, large reserves and green environmental protection was introduced. In recent years, most of the domestic and foreign research focused on the preparation process and modification effect of bioasphalt. However, the reaction mechanism between biomass modifier and commonly used modifier in composite modification is still less, and the modification research and evaluation method of matrix asphalt need to be further explored. Therefore, the preparation process of biomass modified materials and bio-asphalt is reviewed, its modification effect analyzed, the modification effect of existing commonly used modifiers and biomass composite on asphalt compared, and finally the content of this paper summarized and condensed, the existing preparation process and modification effect summarized and evaluated, the problems existing in the research of bio-asphalt put forward, and the development trend of bio-asphalt prospected.