Abstract: According to the structure characteristics of straddle-type monorail vehicle single-axle bogie, the balance bar and the traction rod is installed between the bogie and the car body because of the interaction between balance rod and traction rod. If both are not properly designed, the whole vehicle will deteriorate in the dynamic performance. Therefore, it is necessary to properly select the stiffness parameters and the installation position of balance bar and traction rod. In this paper, the influence of the traction balancing device parameters on the dynamic performance of the whole vehicle is analyzed through simulation calculation, and the traction balancing device parameters required by the optimal vehicle dynamic performance are reasonably selected.