The tightening of rotor conducting bar is an important process to ensure the end stability of the rail traction motor. In order to identify the influence of the tensioning scheme on the fastening characteristics in the conducting bar slot, the rotor tensioning manufacturing process is optimized. The finite element plastic analysis method is used to obtain the stress and deformation distribution when the conducting bar is tensioned. The contact state and contact pressure in the conducting bar slot are analyzed, and the correlation influence of the conducting bar side forces under different tensioning schemes is identified. At the same time, the process verification results of this scheme are in good agreement with the simulation analysis results. It has certain guiding significance for the design and application of traction motor core structure.