Abstract: Located in the headwater upstream of the Taihu Lake Basin, which is a dersely populated and economically developed area in China, the West Tiaoxi River catchment is a frequent flood hitted area due to its nature and characteristics of climate. A local scale integrated hydrological model has been developed for the studies of flood mechanisms and dynamics in this area. The model consists of several modules of sub models including the Xin’anjiang model and the hydraulic model of unsteady flow in open channels etc.. Testing results of the model show that it is reliable for planning the water resources engineering and for assessing flood risk.