Abstract: For stainless steel-carbon steel sector laminated plates, the laser concentric circular scanning method was used to bend the plates. The geometrical characteristics measurement of deformed sample were measured by laser scanner. The bending angle of each position of the laser scanning lines and the deformation characteristics of the curved surface on both sides of the scanning line were analyzed. The effects of laser processing parameters and sheet geometry parameters on laser arc scanning bending of sector laminates were studied. The results show that deformation zone of the scanning line after laser circular scanning is three-dimensional curve in space and the bending angles at the scanning line are different. The angle in central line is the smallest and increases gradually to the left and right sides of the plate, reaching the maximum at the edge of the plate. The angle is basically symmetrical along the center line of the plate; The surface is obviously deformed by a curved surface and the area from the scanning line to the outer circular line of the sector plate is inwardly recessed, and the area from the scanning line to the inner circular line of the sector plate is convex outward. The research results provide a basis for in-depth understanding of the three-dimensional deformation mechanism of laser circular scanning.