Using the k~ε closure turbulence model in CCHE2D software, This paper simulate the water and sediment movement in artificial bend of the Shimenzi headwork at Daxigou. Furthermore, we get the transverse slope of water surface, the sediment scouring and deposition patterns of typical sections, the sediment of lateral transport phenomena and the riverbed deformation after sediment deposition. Compare the numerical simulation results about the sediment scouring and deposition patterns of sections with the experimental data. The result is good and in line with the mechanism of the concave bank erosion, convex bank deposit. Analysising of the results predicted showed that the CCHE2D software used to simulate the curve of water and sediment, can fully demonstrate the sediment scouring and deposition patterns under the effect of the circulation flow. But for the cross-sectional velocity vector distribution and the water and sediment change process under the effect of the circulation flow, three-dimensional software is needed.