A three-dimensional design method for the hydraulic torque converter blades were proposed and its basic design flow was provided. The pump wheels, turbine wheels, and stators generated by the different blade parameter profiles were compared and the fundamental law of the converter performance versus the blade angle profile was derived. The design of the blades and the corresponding computation of the converter performance were implemented by 3-D CAD/CFD technology. The obtained results were verified by their comparison with the baseline, W305 type hydraulic torque conveter.