In order to promote the ecology function of forest in buffer zone of Lake Taihu and decrease the pollution load of inflows the lake, forest-grass composite strips were established by substituting undergrowth weeds with artificial lawns.The growth feature and trend of five kinds of lawns, Trifolium repens, Oxalis corymbosa, Ophiopogon japonicus, Dichondra erpens and Cynodon dactylon planted in 25 cm under the forest in buffer zone were studied by positioning monitoring in this paper.The results are as follows: During 2011-2014, the most types of lawns could grow normally and formed a dominant population,except for Cynodon dactylon replaced by the weeds; Ophiopogon japonicus and Dichondra erpens were the best in terms of biomass, coverage, uniformity and green period, followed by the Trifolium repens, while Oxalis corymbosa population were unstable which affected by the hydrothermal conditions.