Maintaining and dredging the shallow reefs and shoals in the Lanjiatuo Waterway are difficult due to the complex navigation environment.This paper proposes a reasonable dredging scheme after analyzing the difficulties in implementing maintenance in the research section.According to the process of changes in water levels in the Huangniwan gauge in recent years，this paper advocates advancing the dredging construction time from the dry season to the middle water period.The paper also optimizes the layout of the channel during the construction period，the mud throwing position，and the construction sequence，so as to achieve non-prohibited navigation during construction.Based on the implementation effect of the scheme，the construction quality meets the design requirements，and the construction period is shortened from the expected 30 days to 23 days.While ensuring the normal economic benefits of the waterway，the dredging scheme also reduces the construction costs.