Abstract: The hydroxyapatite supported Ag3PO4(Ag3PO4/HA) was prepared by the ion exchange process and characterized by XRD, TEM. The photocatalytic activity was evaluated by methylene blue (MB) degradation under dark and under UV light irradiation. The results indicated that Ag3PO4/HA is an excellent photocatalyst under UV light irradiation. The silver ion utilization efficiency of Ag3PO4/HA is higher than that of pure Ag3PO4. The photocatalytic degradation efficiency is dependant on the dose of Ag3PO4/HA, the loadings of silver ion on HA support and the concentration of MB solution.