In view of the collapse and retreat of the embankment or revetment in the upper reaches of the Yellow River，which leads to the widening of the river channel and the siltation of the waterway，a waterway regulation plan for bank collapse obstructing reach is studied. A two-dimensional mathematical model of water flow is used to calculate the changes in hydrodynamic conditions in the navigation channel before and after the bank collapse in the Heixiatan section of the Yellow River，and the different channel regulation schemes are analyzed. The results show that：1）The flow conditions（velocity，flow pattern，etc.）in the navigable channel before the river bed morphology changes due to bank collapse or sand mining in the excellent river section can provide an important reference for the navigable flow conditions after implementation of the waterway regulation plan. 2）According to the observation of the effect after the implementation of the project，using the regulation project to appropriately adjust the width of the middle and low waters to make the flow velocity in the navigable channel close to the flow velocity before the bank collapse，is very effective in maintaining the stability of the navigable channel.