Abstract: The Taihu Basin was hit by No. 2421 Typhoon "Kong-rey" in November 2024. Although it did not directly land in the Taihu Basin, it had brought relatively strong wind, storm and tidal surge effects. The water levels of stations in the river network were generally low, but water levels at multiple stations have exceeded the threshold. Based on rainfall and water levels data during Typhoon "Kong-rey", the process and characteristics of rainfall level were analyzed. The results showed that: The Taihu Basin rarely encounters Typhoon "Kong-rey" in November. The accumulated rainfall in the basin is massive, ranking the third after the flood season of nearly 30 years. The duration of rainstorm is short and the rainfall intensity is huge. The water levels of stations in the river network have risen sharply, and the water levels of entire stations along the Grand Canal have alerted.Seven stations in the southern and eastern of the basin have exceeded the guaranteed water levels. The water level rise of Jiaxing was abnormally immense, and the highest tide level of Mishidu on the main stream of Huangpu River ranked fourth in history. The research can provide reference for post flood hydrological information forecasting and typhoon defense work.