Laser shock forming (LSF) is a novel technique that uses laser-induced shock wave to shape sheet metal. The principle of sheet metal forming caused by multi-shock laser shocking was investigated. On the basis of mathematical modeling of laser shock loading, numerical simulation of deforming process of sheet metal was done with the ABAQUS code along the tracks of linear and circular pattern. The relationship between the main parameters of laser shocking and the deformation of sheet metal was studied, and the optimized track was obtained for the deformed sheet of round shape from the numerical simulation. According to the simulation results, the experiment of overlapped laser shock forming of aluminum alloy specimen was carried out and the obtained deformation of sheet metal was in agreement with the simulations analysis. By means of FEM technique, the laser process parameters can be optimized and the deformation contour of LSF of sheet metal can be predicted.