River water purification and improvement method

The invention discloses a river water purification and improvement method. The method comprises the steps of water source data query, field data collection, water quality condition analysis, river channel ecological restoration, water quality flow monitoring and water quality improvement calculation, and the river channel ecological restoration comprises the steps of deodorization, biological flocculation, degradation of pollutants in bottom mud, water body purification and nitrogen and phosphorus conversion. A deodorant, a biological flocculant, a water purifying agent, a mud purifying agent and a nitrogen and phosphorus converting agent are used for the ecological river channel, and the constructed wetland is divided into a surface flow constructed wetland, a horizontal subsurface flow constructed wetland and a vertical subsurface flow constructed wetland. According to different natural conditions, hydraulic conditions and pollution conditions, various factors are comprehensively considered, the most suitab