Aluminum bronze and PEEK coating were selected as floating shaft sleeve materials,and 20CrMnTi was used as gear material,friction and wear tests were carried out on two kinds of floating shaft sleeve materials under the mineral oil working medium by using friction and wear test device.Under a certain speed,change rules of the friction coefficients and temperature were obtained by changing the loading force,the limit pv of aluminum bronze and 20CrMnTi was 22.55 MPa·m/s,and that of PEEK and 20CrMnTi was 36.83 MPa·m/s.By analyzing its wear mechanism,it was found that the former was mainly adhesive wear and abrasive wear,while the latter was adhesive wear.The results show that PEEK coating material has better friction performance than aluminum bronze and is more suitable for high-speed gear pump floating sleeve material,which contributes to the high-speed and long-life of gear pump.