Abstract: Affected by Typhoon Rumbia no 201818, the Yishusi River Basin suffered heavy precipitation from august 17 to 20. The water levels of Yihe River and Shuhe River rose rapidly. The discharge of Daguanzhuang Gate(new) and Shiliang River Reservoirs exceeded historical records. The Xinshuhe River experienced the largest flood since 1974. Taking the control project along Xinshuhe River and the node hydrological stations as the starting point, the flood discharge process of Xinshuhe River is analyzed, which provides data reference for the accurate regulation of Xinshuhe River in the future.