Abstract: The BiOBr/graphene (BiOBr/RGO) hydrogel composites were prepared via hydrothermal method in this study. The composition and morphology of materials were characterized by XRD and SEM. Photocatalytic properties of the BiOBr/RGO hydrogel composites on sodium n-butyl xanthate were systematically investigated, respectively. The results show that three dimensional macroscopical BiOBr/RGO hydrogel composites are successfully prepared, which is beneficial to recycling. When initial concentration of 50 mL sodium n-butyl xanthate is 25 mg·L⁻¹, degradation time is 85 min, and the dosage of photocatalyst is 10 mg. The degradation efficiency of the BiOBr/RGO hydrogel composite (mass fraction of BiOBr is 92wt%) for sodium n-butyl xanthate can reach 96.69%, and that of BiOBr is merely 44.84%. In all, the introduction of RGO can improve the photocatalytic performance of BiOBr, and macro material is favorable for recycling.