Abstract: This study investigated 2024 aluminium alloy subjected to pulsed electric treatment(PET), pulsed magnetic treatment (PMT), and pulsed electromagnetic coupling treatment (EMT). The influences of pulsed electromagnetic fields on microstructure and mechanical properties were systematically analyzed. The untreated alloy contains coarse blocky second-phase particles and severe segregation, which limit its mechanical performance. Pulsed electric treatment refines the second phase and promotes its uniform distribution, thereby improving alloy strength. This arises likely due to the electric field lowers the nucleation energy of precipitates and accelerates the formation of fine precipitates. Pulsed magnetic treatment exerts no obvious regulatory effect on the alloy's microstructure, but plasticity shows slight improvement, possibly from magnetic-field modulation of dislocation-solute interactions. Pulsed electromagnetic treatment produces a more significant strengthening effect. The second phase is finely and uniformly dispersed, segregation is reduced, and both strength and plasticity are enhanced. Such comprehensive performance improvement originates from the synergistic effect of precipitate refinement induced by electric pulses and dislocation motion regulated by magnetic pulses. After the alloy is treated by pulsed electromagnetic treatment at 2 V and 2 T, its tensile strength, elongation and hardness increase by 3.1%, 2.7% and 3.7%, respectively, representing the best mechanical property improvement among all treatments.