Based on the the climate data of Lantian meteorological station and hydrology data of Maduwang hydrological station and the climate data of Lantian meteorological station in the Bahe River Basin collected from 1960 to 2012, this paper analyzed climate and water-sediment change rules of the said basin, at the same time the relationship between water-sediment variation and climate change was discussed by using correlation analysis, gray relational analysis and multiple linear regression model, etc. The results showed that the rainfall, evaporation, runoff and sediment discharge in the Bahe River Basin all showed a significant downward trend while the temperature was on the rise. Rainfall had an important relationship with water and sediment, from the year 1960 to 1990 the sensitivity of climate factors affecting runoff was rainfall, temperature and evaporation in turn, and between the year 1991 and 2012 the sensitivity was rainfall, evaporation and temperature. When the temperature and evaporation were constant, if the rainfall increased 1mm each time, the annual runoff would increase by 0. 014×10⁸ m³ and 0. 008×10⁸ m³ respectively in the above two period. From the year 1960 to 2012, the climate factors affecting the sediment discharge in the Bahe River Basin were rainfall, temperature and evaporation. When temperature and evaporation were unchanged, the annual sediment discharge increased by 0. 668 ×10⁸ tons for each increase of rainfall by1mm.