Hydrology Department has collected long series of hydrological dates, and finished the investigation and evaluation of Jiangxi province water resource during 1956-2000 in 2008. On this basis, taken the last 15 years of investigation and evaluation of water resource into consideration, the annual distribution, interannual variation and spatial distribution of precipitation in Jiujiang during 1956-2015 are analyzed. The characteristic of water resource quantity in Jiujiang for last 60 years, rules of the annual variation, and the changing trend of water resource quantity of Jiujiang are studied by using of linear trend regression test and SPSS software. The results show that the water resource quantity of Jiujiang was affected by the temporal and spatial distribution characteristics of precipitation, and the interannual variation of water resource is relatively large. Over the years total water resource shows a growth trend, but the trend is not obvious.