Ceramic film with porous bioactive behavior on the pure Ti was successfully prepared by MAO in electrolyte solution containing 20 g/L Na2HPO4 and 2g/L KOH. Structure of the prepared film was observed by OM （optical microscope） and SEM （scanning electron microscope）. The results show that

with increasing in electrolyte concentration

the arcing voltage is decreased

and thickness of the ceramic film is increased to maximum value of 13.6 μm

and surface roughness is increased to maximum value of 3.2 μm. The prepared ceramic film with uniform porous structure on pure Ti can be observed in the optimized electrolyte solution with rational MAO processing parameters.