Pile and column integrated forming structure and construction method thereof

The invention relates to the field of cast-in-place pile construction, in particular to a pile-column integrated forming structure and a construction method thereof.The pile-column integrated forming structure comprises a steel casing installed on the ground, a bottom reinforcement cage is arranged in the steel casing, and a top reinforcement cage is fixed to the center of the top of the bottom reinforcement cage; clamping auxiliary parts used for clamping the steel casing are arranged on the two opposite sides of the steel casing correspondingly, mounting plates erected on the upper surface of the steel casing are fixedly arranged on the tops of the clamping auxiliary parts, the two mounting plates are mutually spliced, a receding round hole is formed in the splicing center position, and pouring holes allowing guide pipes to be inserted in are formed in the surfaces of the mounting plates. The top reinforcement cage vertically penetrates out of the receding round hole, the two opposite sides of the mounting