In view of the narrow and curved river of Maojiaokou and Jiaotanwan in the main stream of the Zijiang Ｒiver，we carry out the scheme design for channel regulation by cutting，dredging and slotting，etc. and analyze it by conducting the physical model，mathematical model and ship navigation test for. The analysis of the underwater bed topography and water level after project implementation reveals that the river bed of the navigation-obstructing is stable，the flow is smooth，and expected effect is achieved. Thus it may serve as reference for similar projects.