Abstract: The Taihu Basin waste load model is built by studying the discharging direction,producing amount and treatment coefficient of pollution load for various point sources and non-point sources in the Taihu Basin.The integrated input data of various waste loads of pollutant sources are acquired by calculating output of the Taihu Basin waste load model,which is input data for the Taihu Basin water quality model.The output and treatment amount of pollutants of various pollutant sources in the Taihu Basin can be visually displayed by the figure,quantifying the waste load difficult for a direct measurement in the whole Taihu Basin.