For soft soil foundation such as loose sand，silt and clay，we study the measures to improve the bearing capacity and reduce the settlement.The usable soil layer of vibro-compaction method is loose sand.The vibro-replacement stone column method is used to treat silt，general clay and soft clay (silt，silty soil).The usable soil layers of vibro-powder sprayed stone column are silt and clays ( the undrained shear strength?cu＞?15 kPa).We introduce the material mix ratio of vibro-powder sprayed stone column，obtain the cube compressive strength through test，and use dry bottom discharging technology in construction.The results show that compared with vibro-replacement stone column，vibro-powder sprayed stone column can increase the bearing capacity of the foundation by about 1.3 times and reduce the settlement of the foundation，which has a broad market prospect.