Preparation method of economical water purification plant

The invention discloses a configuration method of economical water purification plants. The method comprises the steps of evaluation of a to-be-treated drainage basin water body and a surrounding environment, screening of the water purification plants, quantitative evaluation of the water purification plants and configuration of the water purification plants. According to the river coastal environment, pollutant types and content of polluted water, nutritional characteristics of water purification plants and action characteristics of the water purification plants on pollutants, reasonable water purification plant layout and combined planting of aquatic plants and terrestrial plants are carried out, and various characteristics of absorption types, absorption amount and the like of each plant are fully considered. The remediation potential of plants is exerted to the maximum extent, the benefit maximization of the plant remediation technology is achieved, the technology plays an important role in the aspect of