Abstract: Magnesium alloy has the characteristics of low density, good heat dissipation, and high tensile strength, and has a large development space in the field of lightweight structural components. The forging process is simple, the production efficiency is high, the quality is stable, and the isothermal forging parts have higher dimensional accuracy and better performance indicators. Based on the analysis of the forming process of magnesium alloy material, through experimental of multiple forging which showed the changing of performance index after multiple forging in this paper. The microstructure of magnesium alloy is optimized by multiple forging which improve the strength and fatigue resistance. The components of magnesium alloy also have good rigidity, and the forging process can expand the application prospects of magnesium alloy with lightweight materials, especially the multiple forging process which suitable for more demanding fields, such as aerospace and automobile manufacturing.