Construction method for self-purification of garden water body

The invention relates to the technical field of water purification, and discloses a construction method for self-purification of a garden water body, which comprises a garden pool, a water purification treatment pool and a sludge pool enclosed by partition walls at the edge of the garden water body, and the water purification treatment pool is provided with a water inlet, a water outlet and a drain outlet. A water quality sensor is arranged on a pipeline for communicating the water outlet with the garden water outlet, a downstream pipeline of the water quality sensor is connected with water quality detection equipment and a dosing pump through a branch pipe, and the water quality detection equipment is provided with a detection water inlet, a disinfection water outlet, a PH adjusting water outlet pipe and a flocculant adding water outlet pipe; a plant floating bed area, an aquatic plant growth area and a fish growth area are arranged in the garden pool. According to the invention, the water body can be self-c