CFG pile construction device and construction method

The invention belongs to the technical field of foundation construction, and particularly provides a CFG pile construction device and method. The CFG pile construction device comprises a long screw pile machine, a drill rod assembly, a grouting assembly and a reinforcement cage hanging and placing assembly, operation of ground drilling, grouting and reinforcement cage placing can be completed, and after cement slurry is solidified, a CFG pile is formed. The drill rod assembly comprises a drill rod shaft, a drill bit, a spiral blade and a reaming mechanism, the reaming mechanism has a contraction state and a reaming state, and the CFG piles in various forms can be formed, so that constructors can conduct pile body construction in different forms according to different soil layer conditions, the shear resistance and the bearing performance of the pile bodies are improved, and the pile bodies are prevented from being broken or settled. By arranging the reinforcement cage hoisting assembly, the anti-shearing perf