The invention belongs to the field of material processing engineering, and relates to a method for achieving high-frequency vibration assisted laser welding on an aluminum alloy. The method comprisesthe following steps that a pretreated aluminum alloy workpiece is rigidly fixed to a working platform where an electromagnetic vibration exciter is assembled, and under the action of the electromagnetic vibration exciter, during the proper resonant frequency and vibration accelerated speed of the aluminum alloy workpiece, laser welding is carried out in the shielding gas environment. According tothe method, the high-frequency vibration assistance process is introduced in the aluminum alloy laser welding process, grains are refined through the mechanical vibration function generated by high-frequency vibration, and the mechanical property of a welding joint is improved; the temperature gradient of the area around a welding seam in the welding process is reduced, flowing of liquid metal ina molten pool is facilitated, and air holes are reduced; and automatic control is easy to achieve, efficiency is high, operation is convenient, and quite ideal engineering application significance isachieved.