Because the slope in the middle reach of the Huaihe River is smaller than that in the upstream, the flow rate becomes slow and the flood is gathered in the middle reach. Therefore, the flood volume usually exceeds the discharge capacity in the middle reach, and the flood storage areas are frequently used. By analyzing the relationship between highest water level, 1-day and 3-day flood volume, this paper put forward the idea of scheduling floods according to the relationship. In real-time scheduling, when predicting 1-day flood volume is large, the volume should be cut down according to the correlation; and when predicting 3- day flood volume is large, the volume should be mainly cut down. This method was verified in floods occurred in the Huaihe River Basin in 2003 and 2007, and good results were achieved.