The nanorod-shaped Ag3PO4 / ZnO composites were prepared by in-situ growth method using one-dimensional rod-shaped ZnO as a carrier. The structure of the composites was characterized by XRD, SEM, TEM, XPS and UV-Vis-DRS were used to characterize the crystal phase, surface morphology and optical absorption of the nanorod Ag3PO4 / ZnO nanocomposite. The optical properties of the sample in visible light Catalytic properties. The results show that ZnO has almost no visible light activity, and the hydrothermal method changes the morphology of ZnO to increase its specific surface area, which provides more possible loading for Ag3PO4. The complex Ag3PO4 / ZnO showed a significantly higher photocatalytic activity than pure ZnO and Ag3PO4 in visible light. Finally, the photocatalytic stability of the Ag3PO4 / ZnO composite shows that the Ag3PO4 / ZnO composite forms an effective heterojunction structure and inhibits electron-hole recombination, thus greatly improving the stability of the Ag3PO4 / ZnO composite.