AbstractAs a reinforcement phase to form metal matrix composites, graphene has attracted more and more attention due to its excellent properties i.e. optical, electrical and mechanical properties. However, the dispersion of graphene has always been an important factor that significantly effects its development. This paper mainly summarizes the physical methods to improve the dispersion of graphene and analyzes its internal mechanism, moreover the advantages and disadvantages of these methods are depicted and compared. Finally, the improvement of the dispersion of graphene and its future applications are prospected.