Aiming at the shortcomings of the current domestic regulations on the scale of large-scale artificial waterways，theoretical analysis and numerical simulation analysis methods are used to obtain the correlation between the scale of large-scale artificial waterways and the navigation performance of 10，000-ton ships，including speed and economy. Based on the coupling relationship between large scale artificial waterway and ship performance，the influence of the limited channel scale is studied from the aspects of minimum bottom width，minimum water depth and section coefficient. A large-scale restricted channel design method led by the design ship type and speed is established.