The invention provides a preparation method for a bright mung bean superoxide dismutase liposome, belonging to the technical field of superoxide dismutase. The preparation method comprises the following steps: crushing and drying bright mung bean; extraction of bright mung bean superoxide dismutase; hot bath treatment; centrifugal filtering so as to obtain supernatant I and filter residue I; fractional precipitation with ammonium sulfate; treatment with a G-200 sephadex column; extraction of the filter residue I with anhydrous petroleum ether; digestion of a mixture II in 95% ethanol; dissolving of paste I in ether; dissolving of paste II in acetone; crushing of a foamed solid; dissolving of powdery extract I in a mixed solvent; addition of cholesterol into a mixed solution I; injection of a superoxide dismutase phosphate buffer; pressure-reduced drying; dissolving in a phosphate buffered solution; etc. According to the invention, the filter residue extracted from the bright mung bean is used for preparation of the bright mung bean superoxide dismutase liposome; the method is simple; the prepared bright mung bean superoxide dismutase liposome has the characteristics of high encapsulation efficiency, stable properties, low embedding cost, wide sources of raw materials used for preparation, etc.; and the method is beneficial for comprehensive utilization of bright mung bean.