As a mature foundation treatment technology,the bored pile is widely used in the foundation treatment of industrial and civil buildings.With the development of the port,the bored pile is put into use increasingly.At the present stage,the port land is usually newly formed with block stones or backfilling of rocks and earth,which is loose and unconsolidated.Some special construction technologies are taken to ensure the bored piles’ pore-forming successfully.This paper probes into the main technological feature of caisson pile drilling construction on loose land area.