La2O3 doped β-PbO2 electrode（La2O3 -β-PbO2）was prepared by electrodeposition and further characterized by X-ray diffraction（XRD）and scanning electron microscpy（SEM）It was observed that La2O3particles could be incorporated in the deposit uniformlyThe result of electrochemical test demonstrates that the way of La2O3 doping can significantly increase oxygen evolution overpotential of lead dioxideCompared with conventional β-PbO2，La2O3-β-PbO2 not only has fast COD removal rate，but also has high instantaneous current efficiency（ICE）in the process of degrading 4-chlorophenolFor example，the COD removal rate and ICE for La2O3-β-PbO2 reached 61.76% and 3.68% after 480 min electrolysis，respectively，while 30.58% and 1.01% for β-PbO2 under the same conditionsTherefore，this electrode indicated good prospects of application.