According to the characteristics of deep and thick soft soil ground and the requirements of ground treatment， combined with the comprehensive treatment technology advantages of the four foundation treatment methods of gravel cushion， light well point precipitation， dynamic compaction， and vibration-replacement stone column， experimental research on comprehensive foundation treatment technology was conducted. The treatment process index such as groundwater， pore water pressure were carefully monitored， and the foundation bearing capacity before and after treatment was compared and analyzed. The results show that the comprehensive ground treatment method can make up for the shortcomings of a single ground treatment method， and can effectively improve the bearing capacity of ground. The article can provide a reference for subsequent construction of similar ground treatment projects.