The equal channel angular drawing process of 7075 aluminum alloy at room temperature was simulated numerically by finite element software Deform-3D, and the distribution laws of metal flow, maximum principal stress, equivalent stress and equivalent strain at room temperature were analyzed to reveal the deformation mechanism of material. Then, the accuracy of the deformation simulation results for 7075 aluminum alloy was verified by the equal channel angular drawing experiment. The results show that the metal flow velocity difference between inlet and outlet of die causes the sample to shrink in the large deformation zone, and the cross-sectional shrinkage rate of sample is 17.97%. The uneven distribution of shear force in the inner and outer die corner zones results in an elliptical cross-section. Under the combined action of metal flow velocity difference and uneven shear force distribution, obvious bending occurs in the large deformation zone. At the beginning of deformation, the stress state in the inner and outer die corner zones is complex, and the tensile stress generated in the corner zone is the highest, resulting in cracks and fractures at the junction of the zone that is difficult to deform and the large deformation zone. At the same time, damage is prone to occur on the surface near the inner die corner in the large deformation zone. During the deformation process, the equivalent stress and equivalent strain distributions of sample show an uneven phenomenon. The equivalent strain at the cross-sectional surface is higher than the internal value, and the equivalent strain unevenness coefficient in the large deformation zone is 0.85, which is better than 1.46 of equal channel angular pressing with the same parameters. After the equal channel angular drawing experiment, the sample has no obvious flash edges and burrs, and the cross-sectional shrinkage rate is 17.49%, which is consistent with the simulation results.