Taking the example of a 577 m soft soil foundation treatment project in the road K0+660~K0+843 of Guangzhou Nansha development zone, contrasts and analyzes the construction technology and construction cost of five common foundation treatment methods of the cement-soil mixing pile method, the vacuum preloading+plastic drainage plate method, the gravel pile method, the bagged sand drain+stack preloading method and the wedge-shaped compaction soil cement pile method. The results show that the engineering cost from low to high is the bagged sand drain + stack preloading method < the plastic drainage plate + vacuum preloading method < the wedge rammed soil-cement pile method < the cement-soil mixing pile (powder spray mixing method) < the vibrational detritus stake method. Three methods of the plastic drainage plate + vacuum preloading, the gravel pile method and the wedge rammed soil-cement pile method achieve better treatment effect; The construction periods of the cement-soil mixing pile method, the gravel pile method and the wedge rammed soil-cement pile method are short. According to the practical engineering characteristics, considering various factors of ground treatment schemes’advantages and disadvantages, economic technology, treatment effect and construction period, it is concluded that the wedge rammed soil-cement pile method is the optimal solution.