Abstract: Metallic glasses have the advantages of high strength, high hardness, excellent wear resistance and corrosion resistance due to their short range ordered atoms, long range disordered atoms, and the lack of typical crystal defects such as grain boundaries, dislocations, and the second phase. However, the intrinsic brittleness and the limited glass forming ability of metallic glasses greatly limit their industrial application. Thus, the optimization of the toughness of metallic glasses has become a hot issue in current research. In this paper, the preparation and toughness optimization of metallic glass films are reviewed. Meanwhile, the future development trend of metallic glass films are prospected.