Laser bending experiments are performed on stainless steel-carbon steel laminated plates with thickness of 1.0, 1.5, and 2.0 mm. The element diffusion in the transition layer of the bending zone is analyzed by means of metallographic microscope, electron microprobe and energy dispersive spectrometer, the nano-indentation tests are used to obtain the nano-hardness and elastic modulus of the transition layer, and the variation in elastic modulus, nano-hardness and yield strength is analyzed eventually. The results demonstrate that the element in the transition layer diffuses continuously and steadily along the plate thickness, the diffusion ranges for Fe, Ni, and Cr are similar, and the transition layer thickness for 1.0, 1.5, and 2.0 mm thick laminated plates increases by 2.5, 3.5, and 3.0 μm, respectively. Good material properties in transition layer is ensured by element diffusion in the bending zone, and favorable metallurgical bond in laminated plates is also improved.