Method for preventing blockage of constructed wetland and synchronously removing nitrogen and phosphorus

The invention discloses a constructed wetland anti-blocking synchronous nitrogen and phosphorus removal method, and relates to the technical field of pollutant control, and the method comprises the following steps: firstly, constructing a constructed wetland sewage treatment physical model, and establishing a mathematical model of microbial community growth conditions in fillers of different grades and TN, TP and COD loads in inlet water; secondly, sampling and analyzing pollutant indexes of sewage of the constructed wetland, and calculating pollutant removal rate ranges of SS, COD, TN and TP according to a water quality target of an effluent receiving water body of the constructed wetland; then quantifying the blocking rate grade, and establishing a constructed wetland blocking risk mathematical model; and finally, designing different sewage pre-treatment facilities according to the blocking risk level of the constructed wetland. According to the invention, the filling blockage risk of the constructed wetlan