Abstract: Degradation of CODcr of fracturing fluids is difficult due to the various types of additives and the complex or-ganic components.A five-step treatment process,i.e.″coag-ulation-oxidization-micro electrolysis of Fe/C-catalytic oxi-dization of H 2 O 2 /Fe 2+ -active carbon adsorption″,is developed through laboratory experiments and taking backflow fractur-ing fluid from exploratory wells in Henan oilfield as study objects.It is used to treat backflow fracturing fluid from other wells.Application shows that this process is simple and that treatment effects are good.