A bimetal-assisted electric treatment method of organic wastewater is disclosed. By the utilization of a first-stage electrolysis system with quarternary alloy as the anode and with graphite as the cathode, Fe and Al bimetal powder is added during the electrolysis process; by means of an electric field, lots of micro-batteries are rapidly formed; after stirring, a three-dimensional electrolysis system is formed in wastewater, electrolysis contact area is increased, and printing and dyeing organic sewage which has high chroma and COD and is hard to treat is treated; the electrolytic current density is 0.1-0.2 A.cm<-2>; electrolysis time is 30-45 min; pH value is 5-10; and electrolytic voltage reaches 10-15 V. by adding Fe and Al metal powder and through electromagnetic stirring, the three-dimensional electrolysis system is formed in the electrolyte, lots of micro-batteries are formed, and the electrolysis contact area is increased. The first-stage electrolysis system with quarternary alloy as the anode and with graphite as the cathode has a good effect of treating printing and dyeing organic sewage with high chroma and COD.