A method based on turbulence theory was used to study the lubrication of the journal bearing with surface texture.The influences of the surface texture,applied in the bearing pad of waterlubricated journal bearing,on the water film pressure,load capacity and turbulent characteristics were studied based on the turbulent model,RNG k-εmodel,and the effects of shape,location,multiscale and size of surface textures on the turbulent lubrication characteristics of bearing were analyzed.The results show that complicated surface texture enhances the turbulent flow of water film and the turbulent kinetic energy,and improves the pressure and carrying capacity of water film.The more edges and sharp corners the texture contains,the easier it forms the secondary vortex.The texture in the entrance zone of wedgeshape reduces load capacity,however that in the exit zone improves load capacity,and the closer to the exit,the stronger this effect.The load capacity of the bearings can be significantly affected by the ratio of the texture axial dimension to its circumferential dimension,and there exists the best ratio value.