Influenced by human activities and climate change,the upper hydrologic process has changed significantly in Fuhe River basin.Thus,based on the trend analysis,we defined 1960-1970 asbaseline period,and analyzed the impacts of climate change and human activities on hydrological processes quantitatively between 1971-1980,1981-1990,1991-2000 and 2001-2005 periods,using the hydrological simulation program-fortran(HSPF).Results indicate that:1)there is a significant trend in average temperature,but no significant trend in annual precipitation,runoff depth or runoff coefficient since 1960;2) climate change has increased the annual runoff by 2.425 billion m~3/10a on average for 1971-1980,1981-1990,1991-2000, 2001-2005,compared with baseline period 1960~1970;human activities,however,decreased the annual runoff by-1.862 billion m~3/10a on average for the same periods.The impacts of climate change on annual runoff kept on a low level in 1970s and 2000s but a high level in 1980s and 1990s,while the impacts of human activities on annual runoff stayed on a low level in 1970s yet a high level since then;3)among the factors of climate change,precipitation is the main one;human activities include changes of land use type and construction of water project;the water project in the lower reaches of Fuhe River plays an important role among human activities.