In order to study the correlation between the water and sand regime and the construction of reservoir dams in the Fuhe river basin,the runoff and sediment load of Lijiadu station of the basin were quantitatively analyzed by using the water and sand process line method,the distance level accumulation method and the double accumulation curve method.The results showed that the annual runoff of Lijiadu hydrological station showed an overall fluctuating downward trend before 2011,and an overall unapparent increasing trend after 2011;Sand load decreased,then increased and finally decreased again before 1995,and showed a significant decreasing trend after 1995.The slope of the runoff-sediment transport double accumulation curve showed an overall upward trend,and the slope of the accumulation curve showed four obvious turns,of which the two changes in 1983 and 2007 were related to the construction of large reservoirs.