Based on the observational records covering the period from 1957 to 1999,the characteristics of precipitation changing over east area of Jianghuai watershed and its connection to sediment yield in Chi river watershed were studied using tendency analysis and correlation analysis. Results showed that the rainfall in this area had a down tendency in spring at a rate of -21.2mm/10a,annual and summer precipitation was increasing at the rate of 10.6mm/10a and 14.8mm/10a. The correlation analysis shows that an amount of sediment transport has a very close relation with runoff and rainstorm of 50~100mm of daily rainfall.