For the maintenance of the well-developed water transportation system，dredged materials of about 200 m3 can be generated from waterways and harbors annually in the United States of America (USA)，and the disposal problem for the huge amount of dredged materials is not inferior to our country.Accordingly，proceeding from the current situation of dredged material disposal，the main development of dredged material management mechanism and disposal technology in USA is summarized.And the beneficial use of dredged material and its engineering cases are analyzed.The investigation shows that it has a dredged material management system with clear right and responsibility in USA，and both U.S.Army Corps of Engineers (USACE) and U.S.Environmental Protection Agency (USEPA) play a key role in the process of disposal management of dredged material.Most of the dredged materials can be used beneficially for the habitat development，wetland restoration，beach nourishment，agriculture and aquaculture.It is now in the phase of research and exploration for beneficial use of dredged material in China，and the successful experience of dredged material disposal management in USA should be worth learning.