Hydroxyapatite　as　a　defluoridator　for　drinking　water　is　characterized　by　a　large　capacity　of　defluoridation,　and　easy　and　simple　operation　in　application.　The　quality　of　drinking　water　is　not　changed,　the　sorbent　is　easy　to　be　regenerated,　and　the　second　pollution　does　not　occur　after　the　treatment　of　drinking　water　with　the　sorbent.　Hydroxyapatite　method　has　advantage　over　the　methods　such　as　actived　alumina,　bone　char　and　electrodialysis　commonly　used　in　defluorination　of　drinking　water.　It　is　for　this　reason　that　the　components,　structural　feature,　synthesis　and　application　of　hydroxyapatite　and　its　mechanism　of　defluoridation　are　summarized　in　this　paper.