Advancing in research of Mg-based hydrogen storage film in recent years was simply reviewed, including the advantage of the film, the function theory of fabricating method and its functional theory, and the influencing factors in the technological process. Research status worldwide was introduced in detail. By comparing Mg-Pd, Mg-V, Mg-Ni, Mg-MmNi5 hydrogen storage films, an ideal tendency for producing Mg-based film was pointed out, for example, low-price alloy substitution, adopting a new method to synthesize Mg-MmNi5 composite, and so on.