GO/CoFe₂O₄ was synthesized by coprecipitation to remove the environmental pollutants efficiently in the water. Dibutyl phthalate (DBP) was removed using the GO/CoFe₂O₄-catalyzed peroxymonosulfate (PMS). GO/CoFe₂O₄ was characterized by SEM, TEM, XPS and XRD. DBP removal efficiency was studied under different conditions in the water. The results showed that, at room temperature, the removal rate of DBP in the anometer spinel granulated GO/CoFe₂O₄/PMS oxidation reaction system, with the initial DBP concentration of 2 μmol/L, catalysts dosage of 0.1 g/L, PMS concentration of 20 μmol/L and pH of 7.0. The removal efficiency of DBP only decreased 5% after 5 times. The new composite catalyst had a potential engineering application prospect due to its high efficiency and easy recovery.