The study evaluates the sludge separation technology in large-scale foundation projects with Analytic Hierarchy Process(AHP).In order to ensure the high efficiency and safety of sediment separation technology in practical use,the study establishes an evaluation index system of technical efficiency,environmental impact,economy,convenience of operation and safety.The results show that sediment separation technology performs well under ideal operating conditions,especially in separation efficiency,adaptability and reliability.However,with the deterioration of environmental conditions,the performance of technology in environmental impact and economy has declined.It is necessary to further optimize the selection and implementation of technology to adapt to different engineering environments.