Taking a certain bend channel head in Xinjiang as the research object, this study uses CCHE and Fluent respectively to establish a mathematical model to study the law of water and sediment movement in the head canal and compare the simulation results with the experimental results of the physical model. The results show that the calculated results of the two numerical models are in good agreement with the physical model results. However, compared with the Fluent model, the CCHE model more closely reflects the horizontal drop phenomenon of the free surface in the lower curve. CCHE model can fully reflect the effect of sediment erosion and deposition under the river bend. CCHE model obviously consumes less time in terms of calculating time, which proves that CCHE model can more effectively and accurately predict the water and sediment movement of the bend channel.