Method for repairing water body by using aquatic plants

The invention relates to the technical field of ecological restoration, in particular to a method for restoring a water body by aquatic plants, which comprises the following steps: arranging a physical fence at the upstream of a polluted water area to intercept large-volume impurities, and putting a water body restoration agent into the polluted water area; an artificial floating island is arranged in a polluted water area, and an adsorption layer is arranged at the part below the liquid level of the artificial floating island; submerged plants and floating plants are planted on the artificial floating island in the height direction; non-woven fabric is laid at the bottom of the downstream of the polluted water area to fix the sludge, and submerged plants and emergent aquatic plants are alternately planted on the non-woven fabric; putting aquatic animals after the submerged plants and the emergent aquatic plants survive; regularly maintaining, harvesting, fishing and putting. The restoration method can be app