The invention discloses a domestic sewage deoiling and filtering device. The domestic sewage deoiling and filtering device comprises a support mounting module and a deoiling and filtering module. The support mounting module comprises an operation mounting barrel, a water inlet pipe is horizontally leftwards arranged at the left upper corner of the operation mounting barrel, a water outlet pipe is arranged at the right lower corner of the operation mounting barrel, and a support mounting frame is arranged at the upper end of the operation mounting barrel. The deoiling and filtering module is mounted in the operation mounting barrel below the support mounting frame and comprises a deoiling structure, a filtering structure and a conveying structure. The deoiling structure comprises a deoiling plate arranged at the right upper corner of the water inlet pipe, and a floating block is mounted at the left end of the deoiling plate. The filtering structure comprises a driving motor arranged in the middle of the support mounting frame. The conveying structure comprises transmission wheels arranged at the right upper corner of the operation mounting barrel. The domestic sewage deoiling and filtering device has advantages of compact structure, high transmission efficiency, scientific filtering sequence, great filtering effects and the like.