A regional climate model PRECIS is coupled with a distributed hydrological model DHSVM.The parameters of DHSVM are calibrated with observed hydrological data, then this calibrated model with its input data of atmospheric conditions simulated by PRECIS is used to simulate the runoff of Jinhua river basin for baseline period (1961-1990) and future period (2011-2040), and the change of runoff in the future period is investigated. To correct the large biases in precipitation and temperature generated by PRECIS, the hydrological model modifies these two inputs. The results showed that the bias correction on precipitation and temperature is effective and that under scenario A1B, the volumes of runoff and peak runoffs in the future period are slightly less than those in the baseline period, although not significant.