As a representative type of 2xxx series aluminium alloy, 2A14 aluminium alloy has been widely used in aircraft wheel hubs and aerospace equipment connectors. To achieve higher strength and toughness in 2A14 aluminium alloy components, the focus should be on the as-cast 2A14 aluminium alloy subjected to rotary tube piercing deformation within a temperature range of 360~450 ℃ and a rolling ratio of 1.10~1.96. The microstructure and mechanical properties of the alloy were investigated through comparative analysis after solution treatment (502 ℃/2 h) and aging treatment (165 ℃/10 h). The results indicate that after rotary tube piercing deformation, the original as-cast structure gradually disintegrates with increasing deformation temperature and rolling ratio, accompanied by an increase in recrystallized grains and serrated grain boundaries. The density of low-angle grain boundaries within the grains increases, the proportion of recrystallization increases, and the content of substructures and deformed grains decreases. The alloy exhibits optimal comprehensive mechanical properties at a deformation temperature of 450 ℃ and a rolling ratio of 1.96, with nearly eliminated anisotropy and a strength?ductility product of 5824 MPa·%. Fracture morphology analysis reveals that the fracture mode transitions from brittle to ductile as the rolling ratio increases.