The Doulizi Beach is a low-water and rapid shoal in the upper reaches of the Yangtze River. After the damming and dredging measures are taken，the waterway conditions are improved. This study uses the measured data to analyze the changes in water-sediment conditions，patterns of floodplains and main channels，and waterway conditions in recent years. It proposes a regulation scheme considering the implementation and effect of waterway maintenance and dredging since 2019. The results reveal that under the influence of clear water discharge after Xiangjiaba impoundment and artificial sand mining activities，the scouring and retreat of the left marginal bank is the main reason for the continuous siltation and widening of the moraine wing and tail section of the Miaojiaoqi moraine and difficult waterway maintenance. Under the current river regime and water-sediment conditions，the left marginal bank does not have the conditions for natural recovery，and the siltation and navigation obstruction of the Miaojiaoqi Beach in the dry season will become the norm. The maintenance mode of early dredging after the flood season and the regulation scheme of adding new regulation buildings can reduce the safety risks in dredging construction and normal navigation.