Abstract: BiVO₄/BaTiO₃ composites were prepared by mixing-calcining treatment of BaTiO₃ and BiVO₄ nanoparticles. XRD and FTIR analysis indicate that the BiVO₄/BaTiO₃ composite is consisted of BiVO₄ and BaTiO₃, and no trace of impurity phase is detected. TEM observation exhibits that the BaTiO₃ nanoparticles with~55 nm are decorated on the surface of BiVO₄ particles with an average size of~400 nm. The photocatalytic activity of BiVO₄/BaTiO₃ composites was evaluated by the degradation of acid orange 7(AO7) under simulated sunlight irradiation, revealing that the BiVO₄/BaTiO₃ composites exhibit improved photocatalytic activity compared to bare BaTiO₃. The photocatalytic activity of BiVO₄/BaTiO₃ composite achieves the optical value when the content of BiVO₄ reaches 8wt% and about 68% of dye is degraded after 6 h exposure, which is 1.9 times of bare BaTiO₃. Moreover, the BiVO₄/BaTiO₃ composite has good photocatalytic stability and the degradation percentage of AO7 maintains~62% for three consecutive runs. The analysis of the photocatalytic mechanism suggests that the enhancement of the photocatalytic activity for the BiVO₄/BaTiO₃ composite is attributed to the photogenerated electron-hole pairs separation derived from the charge migration between BiVO₄ and BaTiO₃.