The progress in submersed macrophyte effectively removing N, P, heavy metals, and organics from the eutrophication water and other waste water body and the allelopathy of algal growth inhibition action are reviewed. And the removal rate of submerged macrophyte is analyzed; submersed macrophyte has a high application value in the waters ecological restoration. The problems involving water quality purification by using submersed macrophyte are pointed out, and the research prospect and direction of submersed macrophyte for purifying water quality are looked forward to.