Filtering device convenient for purifying domestic sewage treated by electrolytic method

The utility model relates to a filtering device convenient for treating and purifying domestic sewage by an electrolytic method. The filtering device comprises a tank body, a filtering membrane assembly and a seawater flushing device, wherein a sewage inlet is formed in the side surface of the tank body, and a flow guide plate is mounted in the tank body; sewage flows through the guide plate through the sewage inlet and is guided downwards; the filtering membrane assembly is provided with a plurality of filtering membranes, the filtering membranes are installed on the annular pipe, sewage is gradually filled in the tank body, dirt in the sewage is filtered out of the membrane assembly through the filtering membranes, and purified water generated in the membrane assembly is gathered together through the annular pipe at the top of the membrane assembly and flows to the outlet; a plurality of nozzles are annularly distributed on the seawater flushing device, deposited dirt is dispersed through seawater sprayed b