In the middle reaches of Yellow river basin, a lot of projects have been built.Human activities have changed the land surface and erosion process, they have also alleviated erosion intensity and retained runoff and sediment. Isograms of sediment transportation modulus and coarse sediment modulus are drawn up based on the obtained data. The variation law of sediment and coarse sediment transportation modulus at areas with more and coarse sediment was analysed.