The foundation engineering construction of a blast-filled ground is characterized by high cost and difficulty of building construction.According to the foundation treatment and foundation pit engineering tests of the start-up area of the eastern part of Taizhou new district,the geological condition of a blast-filled ground and different vacuum preloading treatment schemes of the shallow and medium-thick fill of dredged silt foundation are considered.In addition,analysis of stability and total cost of foundation pit indicates that not only the vacuum preloading treatment scheme of the medium-thick fill is conducive to the support and excavation of foundation pit,but also the total investment in the project is greatly reduced.The conclusion shows that it is necessary to combine foundation treatment with the planning of underground space from the point of view of the follow-up construction and the integrity of engineering.