Abstract: Based on the treatment practice of large-area soft ground, the treatment method for large-area soft foundation is generally qualitative. As far as some real estate construction projects which have strict requirements on foundation deformation control are concerned, the treatment technology of the large-area soft foundation always means pretreatment. The purpose is to make an area that cannot be directly entered by people and equipments and used the natural foundation as a place for putting up installations, and the core is inseparable from drainage and consolidation. In order to achieve the best technical and economic benefits, the time cost and the effect of foundation treatment should be considered into the design requirements of large-area soft foundation treatment. A lot of accidents are directly caused by wrong concepts and methods of piling in deep and soft ground. In the design, in order to effectively control settlement, the pressure load, overload value and calculation of basement additional pressure should consider the stress histories of soil and basement, and be determined by comprehensively analyzing the site load.