The paper introduces the basic principle of advanced oxidation processes involving chemical oxidation,electrochemical(oxidation),photocatalytic oxidation,ultrasonic oxidation,irradiation oxidation and catalytic wet air oxidation,and the recent study of(advanced) oxidation processes used in the treatment of landfill leachate is also reviewed.Combination of advanced oxidation process and biodegradation process,or combination of advanced oxidation processes will be the straightforward path to their applications of treating landfill leachate.