Abstract: The mathematical mode of micro-arc oxidation process parameters and ceramic coating in Ca/P electrolyte system has been established.The relationship between electrolyte parameters (power supply voltage Um,current density J,duty ratio η,electrolyte conductivity and dielectric constant of anodic oxide gas) and the ceramic coating surface morphology,thickness and the response of current during the process have been explored experimentally.The influence of NaOH concentration on the characteristics of ceramic coatings and the response of current have been revealed in the calcium phosphate electrolyte system.The results show that ceramic coating can be filmed at 40 s under the constant voltage system.NaOH concentration has a greater impact on ceramic coating surface morphology.The analysis agrees with the experimental results in lower concentration,and the model provides a theoretical basis for determining the appropriate concentration of NaOH in Ca/P electrolyte system.