It is known that appropriate texture parameters is an effective method to improve lubrication and wear resistance performances of sliding surfaces under the mixed lubrication state. But there are only few studies on the influence of different micro dimples processing methods on the lubrication properties of the sliding surface for low speed and heavy load conditions now. This paper carries out an experimental study on the surface of unit disc specimens of RBJB sleeves, which discuss processing methods on the effects of micro dimple diameter, such as precision mechanical carving, nanosecond laser and femtosecond (fs) laser. And an experimental study is carried out to discuss the effects of micro dimples diameter on the lubrication and antifriction of RBJB pairs, which ranges from 50um to 800um, by using pin-on-disc friction pair of MMW-1 tribometer under the simulated working conditions of sliding velocity of 0.326m/s, normal load of 430 N and temperature of 110 oC. Experimental results show that the optimal processing method is precision mechanical carving, when the diameter of micro dimples is more than 400 um. The optimal processing method is nanosecond laser micromachining, when the diameter of micro dimples is between 200 um and 400 um. And the fs laser processing is suitable for the micro dimples diameter, which is smaller than 300 um. Compared with non-textured unit friction pairs of RBJB, micro dimples with diameter of 71um machined by fs laser significantly improves the lubrication and antifriction properties of RBJB, when the depth of dimples is fixed to 40 um and the area ratio is 5%, which makes friction coefficient reduce by 14.3%, the wear mass loss of journal unit specimens of RBJB reduce by 46.8% and wear mass loss of sleeve unit disc specimens of RBJB reduce by 29%. Therefore, this study proves that the fs laser processing micro dimples have a significant potential to prolong the service life of RBJB under the low speed and heavy load working conditions.