A conceptual flow-sedimentation coupled simulation model for small basins was struc-tured by combining the conceptual equations for interrill and rill-gully soil erosion and tran-sport of the eroded soils which were all described in paper [1] and [2] with a conceptual flowsimulation model which was described in paper [3] and [4].The model was tested in threeexperimental blocks and three small basins and the results showed that the structure of themodel are reasonable and the simulation of flow and sedimentation were very satisfactorycompared to the observed data.