In order to investigate the influence of tooth surface groove texture parameters on the lubrication performance of involute spur gears,the gear meshing model was simplified and the unit groove CFD simulation model was established.By solving the two simulation models without and with considering the cavitation effect,the influence rules of different groove dimension parameters on the lubrication performance of the model were obtained.The results show that the distribution state of oil film pressure in the fluid domain changes by the groove texture,and higher oil film bearing capacity and better dynamic pressure performance are obtained.When cavitation effect is not considered,the oil film bearing capacity is closely related to the change of groove width,but is less affected by the change of groove depth.When the groove texture is shallow and wide,the tooth surface has better lubrication performance.When the cavitation effect is taken into account,the surface lubrication performance changes dynamically with the change of groove width and depth.Compared with no cavitation effect,the gear surface has better lubrication performance when the groove width is small and the depth is large.When the groove width and depth are both small,the cavitation effect has a small influence on dynamic pressure performance.When the groove depth is small and the groove width is large,the cavitation effect has a great influence on dynamic pressure performance.While the groove depth is large,the cavitation effect always has a great influence on the dynamic pressure performance,and is not affected by the change of the groove width.