The invention relates to a multielement zinc-aluminum alloy capable of improving comprehensive mechanical property, belonging to the technical field of zinc-aluminum alloy preparation. The multielement zinc-aluminum alloy is characterized in that the multielement zinc-aluminum alloy is prepared from the following raw materials: industrial aluminum ingot NO.A00, zinc ingot NO.0, electrolytic copper, composite modifier and pure magnesium, wherein the composite modifier contains 20-30% of Ni, 15-25% of Ti, 5-15% of Mn, 5-15% of Cr, 5-10% of Si, 5-10% of Ce, 5-10% of La, 1-6% of Y, 1-6% of Nb, 1-6% of V and the balance of aluminum; the multielement zinc-aluminum alloy is smelted in a medium-frequency induction melting furnace after weighing 27-29% of Al, 2-2.5% of Cu (added in the form of aluminum-copper intermediamidstfrequencye alloy containing 50% of copper ), 0-1.2% of composite modifier, 0.01-0.02% of Mg and the balance of Zn based on percentage by weight. A round-rod-shaped blank iscasted by a common metal type and metal type vibrational casting method, and then processed to a national standard test rod to be subjected to mechanical property testing.