NOVELTY - Treatment of fuel cell wastewater involves taking 2-20 cm long and 2-20 cm wide conductive glass activated with a base solution, where activated conductive glass surface is alternately assembled with cationic and anionic compounds; taking 2-20 cm long and 2-20 cm wide carbon cloth activated with acid solution, where activated carbon cloth surface is alternately assembled with cationic and anionic compounds; and carrying out alkaline hydrolysis on activated conductive glass with 1-5% acetic acid/sodium hydroxide solution and ultrasonic treating for 3-10 minutes.    USE - Method for treating fuel cell wastewater (claimed).    ADVANTAGE - The device has high rate of electricity production, effectively reduces chemical oxygen demand, and has repeatable process and high safety. The method has high electricity production and electricity generation efficiency, effectively solves microbial fuel cell electricity production inefficiencies, wastewater problem, and low chemical oxygen demand removal.    DETAILED DESCRIPTION - Treatment of fuel cell wastewater comprises:    (A) taking 2-20 cm long and 2-20 cm wide conductive glass activated with a base solution, where activated conductive glass surface is alternately assembled with cationic and anionic compounds, cationic compound is water-soluble chitosan, poly diallyl dimethyl ammonium chloride, or polypropylene ammonia hydrochloride polyelectrolyte, and anionic compound is polystyrene sulfonate or alpha -iron(III) sulfate;    (B) taking 2-20 cm long and 2-20 cm wide carbon cloth activated with acid solution, where activated carbon cloth surface is alternately assembled with cationic and anionic compounds;    (C) carrying out alkaline hydrolysis on activated conductive glass with 1-5% acetic acid/sodium hydroxide solution and ultrasonic treating for 3-10 minutes;    (D) treating activated carbon cloth with nitric acid and acidifying for 5-20 minutes;    (E) taking 0-100 g pond sludge, 0-500 mL to be fermented wastewater, and 0-300 mL microbial acclimation liquid as anolyte solution, incubating at 37 degrees C for 0-7 days, and preparing cathode solution composition comprising 10-200 mM iron potassium cyanide or sodium chloride solution;    (F) assembling microbial fuel cell at 0-99999 ohm external resistance, using current or voltage data acquisition cards, and measuring electrochemically active biofilm microbial fuel cell anode using electrochemical measurement station; and    (G) reacting in microbial fuel cell reaction device and separating anode chamber and cathode chamber using DuPont N117 proton exchange membrane.