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The hydroxyapatite(HA)ceramic coating was prepared on surface of alkali treatment Ti6Al4V alloy sheet through a electrochemistry deposition,effects of hydrothermal treatment on the phase of hydroxyl apatite coating were analyzed.The X-Ray Diffraction and Scanning Electron Microscope were used to observe the composition and the microstructures.The results show that HA crystallinity obtained through electrochemical deposition is especially low,and the grain size is small.