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Abstract. In the present study, the BiOCl/graphene composites were prepared through an in-situ hydrothermal process. The structure of the composites were studied and the photocatalytic performance of the composites were specifically investigated in detail through degrading organic dye pollutants. The results showed that the prepared BiOCl/graphene composites showed a petaloid shape and the graphene sheets were uniformly dispersed within the BiOCl petals. Additionally, the results also showed that compared with the pristine BiOCl, the BiOCl/graphene composites had a much higher degradation efficiency to methylene blue and rhodamine B dyes. The present study provides a novel and effective photocatalyst which could be potentially applied in the photocatalytic degradation of organic pollutants.