Laser shock peening is a surface modification technology with great potential and application prospect. Given the extremely short loading time (ns) and extremely large load (GPa) of laser shock peening, samples undergoing laser shock treatment exhibited spinodal decomposition without nucleation, which induced Ostwald ripening phenomenon. Compared with the Ostwald ripening phenomenon caused by heat treatment, the impact phase transition caused by laser shock peening is more complex. Therefore, researching the Ostwald ripening phenomenon induced by laser shock peening has certain theoretical significance for laser shock strengthening technology.