Anti-plugging method and device of constructed wetland

The invention discloses an anti-plugging device of a constructed wetland. The anti-plugging device is characterized by comprising a water collection area substrate and a wetland substrate which are distributed in a vertical current constructed wetland from down to up, wherein wetland plants are grown on the wetland substrate; a pneumatic tube is installed in the wetland substrate; the horizontal section of the wetland substrate faces downwardly and provided with an aeration branch pipe in parallel; the end head of the aeration branch pipe is provided with an aeration head, and the aeration head is located in the middle of the wetland in a vertical direction; one end of the pneumatic tube extending out of the wetland substrate is connected with a gas pump and provided with a valve; and the water collection area substrate is made of gravel, and the wetland substrate is made of coarse sand. The air passes through the pneumatic tube by the gas pump and then is output from the aeration branch pipe and the aeration head, so that the convention current is formed between the air and downlink flooding water so as to impact substrate particles, thereby improving effective porosity, inhibiting blockage and ensuring aerobic environment required by activity of wetland microorganisms.