The invention relates to a novel method for rolling high-strength hard aluminum alloy. The method is characterized in that a strong magnetic field is applied when aluminum alloy is rolled, resistance to deformation of material can be reduced through the strong magnetic field, and the performance of deformation of material can be raised. Ultrathin and high-performance aluminum alloy can be produced through controlling intensity of magnetic induction of the strong magnetic field, the action time of the strong magnetic field, the rolling temperature, the rolling speed and proper reduction. The method is advantageous in that single pass reduction can be distinctly increased, the rolling efficiency of the high-strength hard aluminum alloy can be raised, the power consumption of a rolling mill is reduced, and the cost is saved. In addition, compared with a common rolling method, resistance to deformation of material is reduced, the grains are refined, the texture is uniformed, a part of the residual stress can be eliminated, defects caused by rolling can be reduced, and the yield during a rolling process can be raised by adopting the method to roll, so a thinner and better product can be achieved.