Abstract: Circular groove bulkhead can be finished by laser circular scanning without mould. Therefore, research of the curved surface deformation rule and characteristics was of important significance for engineering applications. Firstly, the influence of the scanning number n, the circular scanning radius R, the plates' width W and the length from baseline to the free end L on the curved surface deformation were analyzed in detail. Secondly, combining with the effect of various parameters on the surface deformation and surface deformation test measurement data, obtained surface deformation experience function about the parameters. Then the surface deformation change rule and trend were analyzed. Finally, the strategy of laser circular scanning has obtained the circular groove bulkhead samples and its two side wall of the mean curvature radius are 84.51 mm and 86.77 mm respectively. This study lays a solid foundation of both the circular groove structure and the double circular grooved structure by laser circular scanning.