It has been observed and studied that the natural restoration process of aquatic vegetation in the experimental enclosure of northern lakeside Lake Taihu,from 1997 to 1999 years.It is found that the local macrophytes for example, the Nymphoides peltata Trapa sp.and Pota-mogeton malainus Mig can be naturally restored in the bare lakeside of big shallow eutrophication lakes by an enclosed protection methods.The cover area by species of Nymphoides peltata and Trapa sp.has taken up to 14.3% and 12.7% of the total enclosure area in the summer of 1998,respectively.The companion species of vegetation are Potamogeton malainus Mig Hy-drilla verticillata Royle and Vallisneria spiralis L.The affection to the natural restore of macrophytes by anthropologic readping and fish culture has also been discussed According to the results of enclosure experiment it has provided a strategy for control of eutrophication in big shallow lakes for example,Taihu Lake.