Elucidating transport rate of pollutants of the rivers around the lake is of great significance to clarify and control the external pollution. Spatial and temporal variations of pollutants transport rate of the rivers around western Lake Taihu were studied according to monthly investigation. The results show that the net input rate of total nitrogen(TN) to the lake was 707.9 g/s, slightly lower than that of dissolved total nitrogen (DTN, 727.0 g/s). The input rate of total phosphorus(TP), dissolved total phosphorus (DTP) and permanganate index (COD_Mn) were 28.8 g/s, 18.2 g/s and 700.9 g/s, respectively. The input of pollutants was mainly form Chengdong River, and followed by Baidu River, Dapu River and Shatang River. The input rates of TN, DTN, TP, DTP and COD_Mn in the 4 rivers accounted for 62.7%, 63.6%, 67.1%, 66.6% and 64.8% of the total input rate respectively. The output of the pollutants was mainly via Taipuhe River, Changdou River and Daqian River and accounted for 86.5%, 86.9%, 85.0%, 85.3% and 80.6% of the total output rate, respectively. The net input rate of TN and DTN was high before flood season, decreased about 25.0% in flood season. The net input rate of TP, DTP and COD_Mn increased in flood season, whereas decreased about 44.2%, 48.8% and 39.8%, respectively after flood season. The transport rate of nitrogen and phosphorus in Chengdong River was significantly influenced by its concentration, but transport rate of each index in other rivers was influenced by flow flux. The concentration of TN in nearshore lakes was not significantly correlated with TN concentration of rivers, but significant positive correlated with the transport rate of surrounding rivers. Concentrations of TN, TP and COD_Mn of offshore lakes have no obvious response to the changes of pollutants input rates.