The invention relates to an aluminum alloy cathode material for nonferrous-metal zinc electrodeposition and a preparation method thereof. The cathode aluminum alloy material is an alloy material prepared by adding an aluminum-manganese interalloy into an antirust aluminum cathode matrix. The preparation method comprises the following steps: smelting the pretreated antirust aluminum and aluminum-manganese interalloy to a softened state, and uniformly spreading a hexachloroethane refining agent and an aluminum-titanium-boron wire alloy modifier on the metal surface; after the charge material is completely molten, stirring upwards, pressing the refining agent and modifier in, and carrying out modification and refinement; spreading a covering agent, removing slag, and casting to obtain the aluminum alloy; and carrying out solution strengthening, aging treatment and hot rolling on the aluminum alloy. The obtained aluminum alloy cathode material has the advantages of favorable corrosion resistance and high mechanical strength, and is capable of enhancing the zinc deposition rate, improving the hydrogen evolution condition and avoiding phenomena of bubbling and plate burning.