Nowadays,although there are a lot of research achievements on reducing and reusing dredged sediment,there are still many technical problems in dredging engineering application.In view of the difficulty of engineering application of dredging technology achievements,we analyze the dredging method,dewatering process,flocculation agent and residual water treatment,point out the reasons of difficulties in engineering application,and put forward suggestions for the management and research of dredging projects.On one hand,it is necessary to strengthen the basic investigation and treatment planning of sediment pollution in rivers and lakes,and improve relevant laws,regulations and technical standards;on the other hand,we should strengthen the research and development of equipment intelligentization and automation,promote industry-university-research cooperation,and strengthen the application of research achievements.