Abstract: The process parameters in laser peen forming(LPF) have great impact on the forming shape of the processed metal sheet.In order to gain desired deformation volume and certain deep of residual stress,it is essential to optimize and control these parameters.In this paper,the orthogonal layout was used to design the main parameters of laser and the sheet.And all the situation was simulated by the ANSYS/LS-DYNA.The numeral result was studied by range analysis method.It was indicated that the optimum design of the parameters in laser peening process by orthogonal method can effectively control the residual stress modality and constructively conduct the experiments.