Highly efficient visible-light-driven AgI/Bi7O9I3 hybrid photocatalysts with different weight ratios of AgI were prepared via solvothermal-ion exchange method. Under visible light irradiation (> 420 nm), the AgI/Bi7O9I3 photocatalysts displayed the higher photocatalytic activity than pure AgI and Bi7O9I3 for the degradation of bisphenol A (BPA). Among the hybrids, AgI/Bi7O9I3 with 33 wt% of AgI exhibited the highest photocatalytic activity for the degradation of BPA. X-ray photoelectron spectroscopy results revealed that the formation of metallic Ag-0 from the hybrids was not observed during the photocatalytic reaction. Further, the photocatalytic activity of AgI/Bi7O9I3 maintained after five recycling runs. The quenching effects of different scavengers displayed that the reactive O-2 (center dot-) and h(+) play the major role in the BPA degradation. The excellent photocatalytic activity of the AgI/Bi7O9I3 composites were closely related to the fast transfer and efficient separation of electron-hole pairs at the interfaces of the two semiconductors derived from the matching band positions between AgI and Bi7O9I3.