The second phase of the remediation project of Minjiang River Passage and the deepening project of the Minjiang River Estuary Barrage Sand Channel have been completed for 26 and 16 years respectively.During the period the conditions of upstream runoff and sediment have undergone great changes.The distribution pattern of the seashore and trough outside the mouth has changed greatly,and a series of problems such as the danger and siltation of navigable ships have occurred in individual sections.The waterway in the estuary area is affected by multiple factors such as runoff,tidal currents and waves,and it is in the process of continuous dynamic changes of scouring and silting,which is difficult to remediate.Based on the maintenance mapping and related data in the past 15 years,this paper summarizes the existing problems and analyzes the reasons for the current Minjiang waterway,and concludes that further governance of seaward channel of Minjiang River is necessary to ensure the safety of ship navigation.At the same time,further governance schemes such as adjusting the route of local sections,throwing bagged sand chain blocks outside the mouth to fix the beach and sand are put forward.It is also suggested that maintenance and restoration may not be necessary if local erosion of the inverted fish mouth dam or submerged dam is found.