Based on the analysis of stress model of unequal-thickness thin-walled frame aluminum alloy, combined with the experimental testing technology and sand-peening (SP) surface treatment, influence of the surface properties of the components on its deformation was studied. The results show that first of all, the deformation of these components after machining shows the complexity of bending inconsistency of the side wall, and obvious bending and torsion. Second, since the sidewalls and the bottom of the component are perpendicular, they can be sand...