Desilting and subsequent backfilling with rock were used in the reclamation works of Dalian airport industrial park project which the thickness of backfill is about 22 m to 24 m.In this project,a foundation treatment test was adopted with two alternatives tamping energy of 10 000 kN·m and 18 000 kN·m.The test includes deep lateral displacement,groundwater level,porewater pressure,ground surface settlement,inclination,settlement in layers,multiple-transient surface wave,response modulus,load-plate test,solid volume ratio and dynamic penetration test.The differences between tests results and theoretical results are analyzed in order to provide a basis for similar projects.