The　compound　bioceramic　coating　containing　calcium　(Ca)　and　phosphorus　(P)　on　titanium　alloy　substrate　was　prepared　by　means　of　micro-arc　oxidation　(MAO)　treatment.　The　results　show　that　under　the　different　electrolyte　the　coating　with　the　color　of　gray　or　black　and　surface　morphology　of　cauliflower　or　honeycomb,　where　Ca　content　and　P　contain　can　attain　30%　and　20%　respectively,　can　be　obtained.　Meanwhile,　the　influences　of　electrolyte　temperature,　current　density　and　discharge　time　on　morphology　and　thickness　of　coating　are　also　discussed　here.