The coupled method of high gravity technology-electrocatalytic oxidation and Fenton oxidation was adopted to treat phenol-containing wastewater. The treatment conditions were optimized. The removal rate of phenol-containing wastewater by the coupled method was compared with that by electrocatalytic-Fenton oxidation, high gravity-electrocatalytic oxidation and electrocatalytic oxidation methods. The results showed that the removal rate of phenol and COD could reach up to 99.56% and 65.43%, respectively after 1 h under the conditions of current density 200 A/m2, initial pH value 3, FeSO4·7H2O dosage 1.25 g/L, H2O2 dosage 40 mmol/L, high gravity factor 30 and liquid circulating flowrate 80 L/h. BOD/COD of the treated wastewater increased from 0.081 to 0.53, which accorded with the requirements of biochemical treatment. The removal rate of phenol was 28.05%, 84.13% and 94.79% higher than the three other methods under similar conditions, respectively. The coupled method of high gravity technology-electrocatalytic oxidation and Fenton oxidation could shorten the reaction time and improve the degradation rate of phenol-containing wastewater.