Papermaking sewage filtering device capable of conveniently cleaning residues

The papermaking sewage filtering device comprises a filtering cavity, a motor and a conveying belt, a liquid inlet pipe is fixedly installed on the side edge of the filtering cavity, and a liquid discharging pipe and a sewage discharging pipe are fixed to the bottom and the middle of the outer wall of the filtering cavity in a penetrating mode respectively; a conveying belt is installed on the outer wall of the bottom of the filtering cavity through a support, a flow accumulating channel is fixed to the lower portion of the conveying belt, side plates are fixedly installed on the inner side wall of the filtering cavity, a rotating rod is installed between the side plates in a bearing penetrating mode, a motor is fixedly connected to the end of the rotating rod, and the motor is fixed to the outer wall of the filtering cavity; a first rotating wheel and a cam are fixed to the edge and the middle of the outer wall of the rotating rod correspondingly, and a limiting frame is installed inthe middle of the fixing