Aiming at the problems of long slurry transportation distance and high energy consumption of DN850 pipeline in large-scale dredging and reclamation projects,the energy-saving effect of pipeline aeration technology under the conditions of transporting fine sand and silt-containing soil is studied by using the method of field tests and relying on the Xiamen Airport's Da-Xiaodeng Land Reclamation Project.The results indicate that aeration technology is suitable for large-diameter pipelines and fine sandy silt soils,reducing the slurry transportation resistance of DN850 pipeline by approximately 5%,increasing the reclamation discharge distance by about 5%,and reducing the oil consumption the backfill construction by approximately 3.84%.Field tests have proved that the energy-saving technology for conveying sludge through the discharge pipe of cutter suction dredgers can reduce the number of sludge pumps opened and the conveying resistance,and the equipment investment cost is low,which provides a new technology for energy conservation and emission reduction of cutter suction dredgers.