Device for treating tail water of rural domestic sewage in forage grass type falling dry type constructed wetland

The invention discloses a device for treating tail water of rural domestic sewage by a forage grass type falling dry type constructed wetland, which comprises a biological tail water treatment unit, a front-end water collecting tank, a peristaltic pump, a siphon water tank, a perforated water distribution pipe and a falling dry type constructed wetland. The falling dry type constructed wetland comprises a fence, and a wetland plant layer, a wetland substrate layer and a wetland water outlet pipe which are positioned in the fence. A water outlet of the biological tail water treatment unit is communicated with a water inlet of the front-end water collecting tank. The peristaltic pump introduces water in the front-end water collecting tank into the siphon water tank through a pipeline. A water outlet of the siphon water tank is connected with a water inlet of the perforated water distribution pipe, and the perforated water distribution pipe is located above the wetland substrate layer. The wetland plant layer is