Aming at the study on deformation analysis of laser cladding technology, laser cladding shaft deformation have been rarely investigated， a set of simplified ladder axis was designed, and the corresponding experiment was carried out. Through the measurement and analysis of the circular runout of different measuring position of stepped shaft under different cladding paths, the optimal cladding path with minimum deformation is obtained. Finally, the correctness of the experimental results is verified by the finite element analysis using ANSYS software.