Abstract:The utilization of graphene to modify the inorganic powder can improve the quality of inorganic powder effectively. In order to further clarify the preparation methods of graphene/inorganic powder composites, promote the popularization and application in the field of road engineering, the main preparation technologies of graphene/inorganic powder composite are comprehensively investigated, i.e. the study of electrostatic self-assembly method and high-energy ball milling method. The technological processes, equipment parameters, test mechanisms and preparation effects of two methods are systematically sorted out, which provide some useful reference for the study on the new materials of road engineering. The results show that the technologies of composites prepared by electrostatic self-assembly method and high-energy ball milling method are simple with environmental protection process and strong generalizability. The stability of the prepared composites is good. At present, the two methods have become the main preparation methods of graphene /inorganic powder composites.