This paper explores the treatment of simulated wastewater from graphene-based composites. The treat- ment of acid fuchsin and methylene blue by TiO₂/RGO and Fe₃O₄/RGO is investigated and characterized. In TiO₂/RGO system, the removal effect of acid fuchsin can reach up to 74.01%; the removal effect of methylene blue can reach up to 94.79%. In Fe₃O₄ RGO system, the removal effect of acid fuchsin can reach 78.55%; the removal effect of methylene blue can reach 98.02%. The results show that the magnetic graphene Fe₃O₄/RGO treatment result is better than that of TiO₂/RGO.