In order to verify the basic theory of multi-type-pile composite foundation and effectiveness in practice,this paper presents the operating principle and analyses the performance of gravel-CFG-pile composite foundation based on engineering application.It is concluded that gravel-CFG-pile composite foundation can both enhance the bearing capacity of natural ground and repair earthquake liquefaction,and economical efficiency and environmental protection sex are also it's advantages.As with all things,the procedure shown here is helpful to design building in similar fields for architects.