In upper Yangtze River between Chongqing and Yibin，there are many reaches of shoal & rapids and flow disorder，which is not affected by the back water and has the mountain natural river characteristics since the regulation of Three Gorges Reservoir.There are many shoals，and it needs maintenance and dredging every year to keep the channel safe and unblocked.It is difficult to dredge and sail in the dry season，and it is dangerous for the construction ship，so there is an obvious contradiction between dredging and navigation.Therefore the means of dredging in advance and easing the contradiction between construction and navigation is taken during the maintenance.This paper concludes the experience about maintenance dredging for many years to serve as reference for the future.