Estimation of the surface runoff of a basin is one of an important study theme of hydrology.In the current study,a basin named Liudaogou which located at north Loess Plateau was chosen as a study location.Based on consideration of the actual terrain and soil physical properties,we developed a numerical calculation model by using kinematic wave theory and the hypothetical channel network for simulating the process of "Rainfall-Runoff" of a distributed-type basin.The simulated results of the observed-discharge shows this numerical calculation model is applicable to the study location.Therefore,an effective numerical calculation method for estimating the surface runoff of north Loess Plateau region was proposed.