When the river channel recovers to its natural state during the falling stage and flood period of the Three Gorges Reservoir，the reef hinders navigation in Wutailiang and restricts the development of the waterway.Therefore，reef removal is urgently needed.According to requirements for short-term waterway construction and long-term capacity expansion，a one-time reef removal scheme was drawn up.Numerical simulation methods were used to predict and analyze the implementation effect.The results are as follows：1）After the implementation of the project，the water depth and the flow capacity in the reef removal area increase.2）The flow regime of the local water area is significantly improved and the flow tends to be smooth.The transverse flow of the channel is reduced to less than 0.25 m/s.3）The water channel with a depth of 4.5 m is above 300 m wide，which has achieved the expected regulation goal.It proves that the scheme is reasonable and meets expectations.