Autotrophic anti-clogging constructed wetland for deep purification of tail water of sewage treatment plant

The invention relates to an autotrophic anti-clogging constructed wetland for deep purification of tail water of a sewage treatment plant. The wetland comprises a water purification plant, a water collection area, a core functional filler matrix area, a cobblestone layer and a water distribution and sludge discharge area which are sequentially arranged from top to bottom, and the water distribution and sludge discharge area comprises a perforated support plate, a multi-bucket V-shaped sludge collection tank, support columns and wetland bottom fixed support columns; the perforated support plateis supported; the lower part of the multi-bucket V-shaped sludge collecting tank is filled with large cobblestones; the core functional filler matrix area is arranged at the upper part of the perforated support plate, the bottom of the perforated support plate is provided with a cobblestone layer to ensure uniform water inflow, purification plants are planted at the upper part of the core functional filler matrix area, a