Abstract: Based on the research of applying Soil and Water Assessment Tool(SWAT),a distributed\|parameter model for non\|point sources(NPS),in Luxi Watershed,the output of the hydrologic module of continuous simulation model for NPS is discussed.The results suggested that SWAT could well describe the long\|time hydrologic process.Generally speaking,the output of the model fits the measured data better when the time step is longer,and the systematical fault is found in daily runoff simulation.This is due to the inherit characteristics of the model and the time precision of the inputs.