Abstract: Through full-scale CFG pile field trials,axial force distribution and pile friction and other parameters are measured,the sustained force characteristics and load settlement of CFG pile are obtained,the pile load-sharing case,the pile shaft distribution and lateral friction force are analyzed,the force characteristics of CFG pile is reflected through the field of engineering model.Studies suggest that:Calculation of composite foundation bearing capacity according to the standard formula is not greater than the value of the field load test,pile-soil stress ratio is proportional to the diameter of the root of cushion material and compression modulus,the CFG pile has negative friction resistance,but there is a greater relationship with the construction conditions.