The invention relates to an ecological restoration method for Penaeus vannamei breeding water, comprising: collecting the tail water from the culture into a tail pond, using the self-settling effect of the water body to initially purify the residual bait and excrement, and then entering the ecological purification pool, and floating plants on the water surface The bionic water plant system is used for biological purification, and then the water pump is used to pump the purified water into the automatic filter for micro-mesh filtration, and then the water body is sterilized by the ultraviolet sterilization box, and then re-enters the aquaculture pond. Aiming at the problems of excessive total nitrogen, nitrite nitrogen and ammonia nitrogen concentration and high turbidity in the culture water of Penaeus vannamei, the present invention adopts technologies such as self-settling, floating plant absorption, bionic aquatic plant system purification, micro-mesh filtration and ultraviolet sterilization to remove large Part of the residual bait and excrement reduces the concentration of ammonia nitrogen and nitrite nitrogen, controls the excessive growth of algae, reduces the turbidity of the water body, improves the landscape effect and economic benefits at the same time, increases the ecological diversity of the aquaculture water body, and has a good application prospect .