Abstract: Submerged macrophytes residues that were transported to the shore by wind wave are an important kind of substance cycling in lakeside. An investigation was carried out in Erhai lakeside to depict the characteristics of wave-transported residue of submerged macrophyte and quantify the consequent changes of total phosphorus and total nitrogen of Lake Erhai. Meanwhile, the amount of total nitrogen and total phosphorus in submerged macrophyte residues were estimated as well. The results showed that:(1) There were totally 10kinds of submerged macrohyte residues transported by wind wave in Lake Erhai including Ceratophyllum demersum, Eichhornia crassipes, Hydrilla verticillata, Myriophyllum spicatum, Potamogeton crispus, P. intortifolius, P. maackianus, P. malaianus, P. perfoliatus and Vallisneria natans. (2) The weights of submerged macrophyte residues significantly varied among different seasons with the maximum values in the winter. (3) Among 10species of submerged macrophyte residues observed in lakeside of Lake Erhai, the residue weights of P. maackianus and V. natans were the greatest among all species. The weights of residues were positively associated with the distribution scale and biomass. (4) The sequence of the weight of residues per unit length collected followed the decreasing order:the west (1.91t/km), the south (1.73t/km), the north (1.61t/km), east (0.86t/km). (5) The total mass of residues in the lakeshore in Lake Erhai was estimated as 2270t. It suggests that 5.64tons total nitrogen and 0.85tons total phosphorus can be exported by wind wave in the Lake Erhai per year.