In order to further explore the control mechanism of the basic characteristics such as surface morphology and porosity of micro-arc oxidation ceramic layers in the process of micro-arc oxidation reaction,magnetic particles,namely Ni-coated graphite magnetic nanoparticles,were innovatively introduced into micro-arc oxidation electrolyte.The influence of the new magnetic additive particles on the micro-arc oxidation reaction process and the wear resistance of the film was investigated.The micro-arc oxidation reaction process was analyzed from the surface morphology,cross-section morphology,porosity,average pore size,thickness,surface roughness,reaction energy consumption and phase composition of the film,and the wear resistance of the film was analyzed by using reciprocating friction and wear testing machine.The results show that through forming the concentration gradient and improving the conductivity of electrolyte,the nickel-coated graphite magnetic nanoparticles have a great influence on the micro-arc oxidation reaction process,significantly changing the surface morphology,porosity and other basic characteristics of the ceramic layer,and significantly reducing the energy consumption per unit film thickness.Based on the analysis of wear surface morphology and wear amount,it is found that the ceramic layer prepared by adding 08 g/L nickel-coated graphite magnetic particles has good wear resistance,and the friction coefficient is stable at a low level.