Laser shock peening (LSP) is a non-traditional anti-fatigue manufactureing technology based on mechanical effect of laser shock wave.Up to now, research on LSP mostly focuses on mechanism and experiment, whereas experimental method is hard to achieve comprehensive understanding on the correlative influence of various parameters to the effect of LSP. A numerical analysis method on typical LSP process is introduced, FEA code ABAQUS and MSC.Fatigue are used as platforms, laser shock loading module is programmed to solve the interface problem of data transfer. Taking 2024-T3 aluminum alloy samples for example, propagations of laser shock wave, size and distribution of compressive residual stress as well as the fatigue properties are studied by numerical analysis technique, and the fatigue life with LSP is predicted. The relationship between laser shock wave pressure, residual stress and fatigue life is established by digital analysis method. Visualization of LSP process and evaluation of peening effect could be achieved.