The double arc oil groove friction pairs are widely used in hydro-viscous drive (HVD). In order to study the influence of oil groove parameters on fluid torque by shear stress, the flow characteristics of oil film was carried out by using the software CFX. The shear torque of film was obtained. An analysis platform, which was built to discover the influence of oil groove parameters on shear torque, was designed based on the flow field parametric modeling, numerical stimulation, design of experimental (DOE) and response surface methodology (RSM). The effects of the depth, the width and the number of the oil groove on shear torque were analyzed and an approximate response surface methodology model was then set up. And a test rig of torque performance was set up. The results indicate that the shear torque decreases with the depth, the width and the number of oil grooves increasing. Meanwhile, the influence of width is the most, and that of the number is the smallest. Through both theoretical and experimental study, the effect of oil groove parameters on fluid torque by shear stress could be much more precisely achieve by CFX numerical simulation and the platform which combine the CAD, CFX, DOE and RSM technology.