The invention discloses a sewage filtering device. The sewage filtering device comprises a first tank body, wherein a sliding rod is fixedly connected between the bottoms of two sides of an inner cavity of the first tank body, two sides of the surface of the sliding rod are sleeved with sliding sleeves, support rods are fixedly connected to the tops of the sliding sleeves, a stirring tank is fixedly connected between the tops of the two support rods, and a moving frame is fixedly connected to the bottom of the stirring tank. By virtue of the cooperative use of the first tank body, the slidingrods, the sliding sleeves, the support rods, the moving frame, first gear teeth, a rotating shaft, second gear teeth, a stirring tank, a first water outlet pipe, a valve, a second motor, a stirring rod, stirring paddles, a drug feeding pipe, a connecting block, a second tank body, a second water outlet pipe, a filter element, a third motor, a hollow rotating rod, a water inlet pipe, brackets, vehicle wheels and a first motor, the problem of poor filtering effect of an existing livestock breeding sewage filtering device is solved, and the sewage filtering device has the advantage of good sewagefiltering effect.