The Taojiang station is the control station in Zishui basin in Hunan Province. The Taojiang River features complexflood composition and high occurring frequency of large floods. Judging from the occurrence of historical big flood over the years,most of them were called “twin” floods in hydrology occurred in two successive years, such as 1954-1955, 1995-1996 and 1998-1999. This study made comparative analysis on the general situation of Zishui basin, the rainfall characteristic and the floodprocess in Zhexi -Taojiang reach and the flood pattern at Taojiang station based on the “twin” floods in 2016 and 2017 inTaojiang River. It could provide reference for the prevention of the “twin” floods in Taojiang River.