At present, all kinds of pollutants are discharged into the landscape water body, and the landscape water body is mostly static or slow flow state. This leads to the deepening of water pollution, eutrophication, blackening of water body, and stench and flood disasters occur frequently. This makes the urban landscape water lose its ornamental value, affects the effective operation of ecological function, and will also endanger the health of residents. Reclaimed water is one of the common methods of modern landscape water, but reclaimed water contains a lot of nitrogen and phosphorus, which will make the eutrophication of water body increase, and easily lead to "algal blooms", water quality deterioration, and loss of landscape function. Therefore, understanding the current situation of landscape water eutrophication and effective prevention and control measures has become one of the water environment problems to be solved.