Abstract: The balance holes pattern perforated in the turbine hub can effectively reduce the thrust load of the torque converter and increase its service life. In order to study the influence of balance holes with different design parameters on the thrust force, different parameter models for calculating the thrust force of the torque converter under different balance hole distribution radius, hole number and hole diameter were established. Based on DOE orthogonal test algorithm and single factor test analysis, the influence of various balance hole on the thrust force of the torque converter was studied. The results show that the thrust load of pump and turbine drops with larger distribution radius. The change of the hole number and the hole diameter has no significant effect on the thrust force. Among these three factors, the hole distribution radius has the greatest influence on the thrust force, followed by the hole number and finally the hole diameter. The optimal pattern in the case studied is 5% to 8% better than the original one. Therefore, on the premise of no affecting performance requirements and structural strength, the radius of the balance hole distribution should be enlarged as much as possible. According to the operating condition requirements of the torque converter, the number and the diameter of balance hole should be set reasonably to protect the bearing.