Piggery with function of soaking dung in water

The utility model discloses a piggery with the function of soaking dung in water. The piggery is 40-60 m in length and 9.5-10.5 m in width; the ground plane of the piggery is sequentially divided into a working channel, an eating activity area and a defecation activity area in the width direction; a prefabricated dung leakage groove is formed in the ground plane of the defecation activity area; a water groove is below the dung leakage groove; the water groove is the same in depth in the width direction of the piggery; the piggery is provided with a slope with a gradient from 0.7 percent to 0.8 percent in the length direction; the distance from the shallowest part of the water groove to the ground plane is 0.5-0.55 m; a concave tank 1-2 m in volume and 1-1.2 m in depth is arranged at the deepest position of the water groove; water is stored in the water groove, and the distance between a water surface to the ground plane is 0.2-0.25 m; the dung leakage groove is a reinforced concrete prefabricated part, which