The effect on fatigue life and fracture morphology of 7050-T7451 aluminum alloy hole by laser shock processing (LSP) was investigated. ABAQUS was used to study the stress distribution of hole wall path and surface path of the hole under different peak pressures. The LSP test and the fatigue tensile test were carried out based on the simulation results. The results show that laser double-sided shock processing on the sides of the sheet forms a depth of residual compressive stress layer

and in the center forms a range of residual tensile stress layer

which is also the main reason for the transfer of fatigue source froms the hole angle to center of the hole wall. Under the stress level of 165.8MPa

195.0MPa and 275.4MPa

the fatigue life of the samples increased by 451%

216% and 116% respectively. After LSP

the fatigue source position of the sample is transferred from the hole angle to the inside of the pore wall

and the area of fatigue crack area is obviously increased. The research show that LSP can obviously improve the fatigue properties of the aluminum alloy with fastener hole

but the strengthening effect decreases with the increase of the external load.