Abstract: The directly vacuum preloading method can shorten the construction period and has obvious effects.It is a soft ground treatment method widely used in coastal areas of China in recent years.In addition to theoretical analysis,realtime monitoring data of settlement,pore water pressure and other indicators are often used as the basis for judging the degree of foundation consolidation in the process of foundation treatment.In this paper,the consolidation degree of the foundation is analyzed by the project of blow-filled soil consolidation in hangzhou bay area.The result shows that the real-time monitoring data of subsidence and pore water pressure can be used to accurately determine the consolidation degree of the foundation,It can provide references for similar projects.