In order to improve the wear resistance of ZL109 aluminum alloy,carbon nanotube additives were added to 〖JP2〗the micro-arc oxidation electrolyte to explore the influence of carbon nanotube on the growth and wear resistance of micro-〖JP〗arc oxidation ceramic layer of ZL109 aluminum alloy.ZL109 aluminum alloy micro-arc oxidation ceramic layers were prepared by adding 04 g/L to 2 g/L carbon nanotubes into the electrolyte under bipolar pulse constant pressure mode.The growth behavior of ceramic layer was analyzed by the aspects of surface characteristics,microstructure,thickness and phase composition,and the wear resistance of ceramic layer was investigated by reciprocating friction and wear testing machine.The results show that the effect of the electrolyte additive (carbon nanotube) on the growth process of ceramic layers is 〖HJ1.5mm〗significant,the characteristics of ceramic layers are significantly changed,the porosity and aperture of the original surface are dramatically lower,but the high concentration carbon nanotube can cause uneven fluctuations on the surface.The carbon nanotube is not directly involved in the ceramic layer,but affect the amount of oxidation products per unit channel area in the process of micro arc discharge through its high storage dielectric microcharging ability,which has a obvious effect on the characteristics of the ceramic layer.The friction coefficient of ceramic layers is increased after the addition of carbon nanotube,but the wear resistance is greatly improved.The ceramic layer prepared by adding 12 g/L carbon nanotube has good wear resistance and low and stable friction coefficient.