Abstract: Due to its complex composition, large solidification intervals（about 100 K）, and tendency towards paste-like solidification, ZL205A alloy is prone to produce coarse solidification structures. Therefore, improving the solidification structure and mechanical properties of the alloy is of great significance. By applying electric pulses during the solidification process of ZL205A alloy, the effect of electric pulses on the solidification structure and properties of the alloy was systematically studied. The results show that by adding electric pulse, solute elements such as Ti and Mn are uniformly distributed, and the refinement effect and long-term effect of alloy solidification structure are significantly enhanced, the minimum grain size can be refined to 95.6 μm; the content of priority precipitated phase Al₃ Ti decreases or even disappears,and a new combination of precipitated phase Al₆ Mn and Al₂ Cu forms at the grain boundaries; defects such as internal shrinkage in the alloy disappear, and after electrical pulse treatment, the tensile strength, elongation and hardness reach a maximum of 292.2 MPa, 14.3%, and 102.8 HV.