Method for synergistically reducing bottom mud by coupling submerged plants with benthonic animals

The invention relates to a method for synergistically reducing bottom mud by coupling submerged plants with benthonic animals. The method comprises the following steps: (1) arranging an overlying water body on polluted bottom mud of a black and odorous water body; (2) adding an oxygenation device and benthonic animals into the water body and implanting submerged plants into the water body; (3) arranging a light supplementing device above the water body, and constructing a benthic organism system; and (4) starting a light supplementing device and an oxygen increasing device, controlling dissolved oxygen in the water body to be 1-10mg/L, culturing benthonic animals and submerged plants, and performing bottom mud reduction operation. According to the method for reducing the bottom mud, the removal rate of organic matters, ammonia nitrogen, nitrate nitrogen and total phosphorus in the bottom mud reaches 30-50%, the removal rate of COD, TP, ammonia nitrogen, nitrite nitrogen and total phosphorus in the overlying w