Abstract: MC nylon, MC oil nylon containing 5% (mass fraction) of lubricating oil, and carbon fiber reinforced compound MC nylon containing 35% (volume fraction) of carbon fiber were prepared. The friction and wear performance of three kinds of nylon under dry friction, clean water, dry sand, and water sand conditions were studied. The results show that the friction factor and wear rate were the smallest of MC oil nylon under the four conditions due to the existence of lubricant film on the surface. Under the conditions of dry friction and water lubrication, the fiber protrusions on the surface of compound MC nylon made the wear rate and friction factor smaller than that of MC nylon. The degree of wear of nylon under water lubrication were lower than that under dry friction. Under the conditions of dry sand and water sand, the ploughing effect of quartz sand caused more furrows appeared on the surface of MC nylon. Only a few furrows appeared on the surface of MC oil nylon due to the lubricant oli film on the surface. The degree of wear of nylon under water sand conditions was lower than that under dry sand conditions.