Aiming at the problem of sediment accumulation in Huanghuacheng reach,which is a key sedimentary channel in the backwater area since the impoundment of the Three Gorges Reservoir,and based on the prototype observation data since the impoundment of the Three Gorges Reservoir,we analyze the water level change,sediment erosion and deposition characteristics,typical section erosion and siltation changes and isobath changes of the Huanghuacheng waterway,and predict the channel conditions and evolution trends of the channel.The results show that there is a cumulative siltation of fine sand in the Huanghuacheng waterway,and the main siltation site is relatively fixed;before 2012,the deposition rate,thickness and range were relatively large;after 2012,with the slowing down of the trend of sediment reduction from the upstream,the sedimentation rate of the Huanghuacheng waterway decreases.