Based on the data from 1951 to 2015 of water and sediment prototype of Lutaizi station of Huaihe River main stream,we apply the tools including SPSS and Matlab,methods including correlation analysis,cumulative anomaly,M-K and R/S analysis to study the the characteristics and change trend of water and sediment in the Liutaizi river section.The results show that,on the premise of no increasing or decreasing of the flow rate,the sediment transport and sediment content are obviously reduced,and the sediment content is basically stable in 0.1 kg/m3 after the year of 2000,and the change of sand sediment has a distinct stage characteristic.The change of sediment transport volume begins in the year of 1984,the sediment content mutation and the beginning of the year.From 1980 to 1986 years,the sediment discharge and the sediment concentration show an increasing trend .The river bed is mainly scoured and undercut.