Aquaculture water-sewage separation device and aquaculture water-sewage separation system

An aquaculture water-sewage separation device is characterized in that a water inlet pipe is diverged to form a plurality of first spray pipes, each first spray pipe is rotatably provided with a water-sewage separation barrel, each water-sewage separation barrel is of a conical structure, the small-diameter end of each water-sewage separation barrel is rotatably connected to the corresponding first spray pipe, and filtering holes are evenly distributed in the side wall of each water-sewage separation barrel; the large-diameter end of the water-dirt separation barrel is opened outwards, and the first spraying pipe sprays water flow from the interior of the water-dirt separation barrel to the side wall so that the water-dirt separation barrel can rotate; the inner barrel is positioned below the water-dirt separation barrel and is aligned with the filtering holes to receive filtered water; a water outlet is formed in the inner barrel; the outer barrel is located outside the inner barrel and the water-sewage sepa