Graphene preparation equipment, graphite powder and intercalation agent in a certain proportion in organic solvent evenly mixed, then use ultrasonic water bath for a certain amount of time to peel, centrifugal separation, filtration to obtain graphene materials. In the traditional process of preparing graphene by ultrasonic stripping, the graphene prepared has the advantages of high quality, excellent performance, few defects and low impurity content. In particular, this method is a physical process, which ensures the stable performance of graphene. In addition, the invention has the advantages of simple and easy process, low cost of product preparation, high concentration of the synthesized graphene dispersion liquid and not easy to aggregate, and has a good application prospect in the field of graphene material photoelectric.