Abstract: In this research, SA/GO@Fe₃O₄ magnetic particle electrode was prepared and the structure was characterized by means of scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray powder diffraction. Methyl orange was selected as the target pollutant. The influence of four factors, including initial pH, particle electrode dosage, electrolysis time and current density, on TOC removal efficiency were investigated. The order influence degrees of the factors were as follows: current density > electrolysis time > particle electrode dosage > initial pH. In addition, the experimental results were evaluated by Box-Benhnken central composite response surface design. The optimum reaction conditions were predicted as particle electrode dosage 2.99 g·L^-1, current density 29.58 mA·cm^-2, reaction time 79.7 min and initial pH 4.31. On this condition, the TOC removal efficiency of methyl orange was 80.03%. The intermediate products and mechanism of the degradation process of methyl orange were analyzed by UV-Vis absorption spectroscopy and Fourier transform infrared spectroscopy, and the degradation pathway was speculated. Besides, particle electrode could be rapidly separated by magnetic field in five seconds. Meanwhile, the degradation efficiency decreased by only 4.3% after five reuses, which proves that SA/GO@Fe₃O₄ magnetic particle electrode has excellent recovery and reuse performance.