Constructed wetland system capable of meeting up-to-standard discharge of water quality under bed stopping and renovating conditions

The utility model relates to a constructed wetland system capable of meeting the requirement of water quality up-to-standard discharge under the condition of bed stopping and renovating, a water distribution channel is communicated with a subsurface flow constructed wetland through at least one water inlet pipe, a valve is arranged on the water inlet pipe, and reeds which are firstly soaked in alkali liquor and then soaked in clear water are arranged in the water distribution channel. The method has the beneficial effects that when the bed is stopped for renovation, the valve on the water inlet pipe of the water distribution channel entering the subsurface flow constructed wetland is closed, tail water originally entering the subsurface flow constructed wetland enters the water distribution channel full of reeds, on one hand, water resistance is increased, the flow speed is reduced, the tail water is in full contact with the reeds, and on the other hand, rich microorganisms are enriched by utilizing the chara