In order to reduce friction of gear meshing interface and improve gear transmission performance and its life,based on bionic tribology and finite element simulation technology,the effect of texture characteristics on the stress of tooth surface was studied,and the reasonable design of texture characteristic parameters were carried out,including the shape,size,density and distribution of bionic texture.The simulation results show that the bionic groove width has great influence on the tooth surface stress,while the groove depth,groove spacing and the distance between the groove and the tooth tip have little influence on the tooth surface stress.The increase of groove depth will lead to the decrease of tooth surface stress.With the increase of transmission torque,the tooth surface stress of texture gear and smooth gear is obviously increased,but under the same conditions,the contact stress of texture gear surface is higher than that of smooth gear surface.