Abstract: Aquatic plants not only absorb a lot of nitrogen and phosphorus pollutants, but after harvest they may also be used for nutrient mulching, recycling utilization and ground cover in tea plantations. 1) A covering of aquatic plants in tea plantations could improve the physical and chemical properties of the soil. It increased the contents of organic material, total nitrogen, total phosphorus, alkali-hydro nitrogen and available phosphorus in the 0-20 cm soil layer, and, increased the contents of soil microbial biomass nitrogen and phosphorus. The soil nutrient declined with an increase in depth. 2) A covering of aquatic plants in the tea plantation could prevent the domination by weed species by significantly reducing weed density and biomass, thus reducing the competition between weeds and tea trees. 3) A covering of aquatic plants in the tea plantation could improve the growing and ecological conditions of tea gardens and promote the quality and production of tea.