The invention discloses a triple retractable column and a hydraulic bracket. The triple retractable column comprises an external cylinder body, wherein a first-stage middle cylinder is arranged in the external cylinder body, a second-stage middle cylinder is arranged in the first-stage middle cylinder, and a plunger is arranged in the second-stage middle cylinder; the external cylinder body is provided with an upper cavity oil port and a lower cavity oil part; the bottom wall of the first-stage middle cylinder is provided with a first bottom valve; the bottom wall of the second-stage middle cylinder is provided with a second bottom valve; the side wall of the first-stage middle cylinder is provided with a first oil hole which causes the upper cavity of the external cylinder body to be communicated with the upper cavity of the first-stage middle cylinder; and the side wall of the second-stage middle cylinder is provided with a second oil hole which causes the upper cavity of the first-stage middle cylinder to be communicated with the upper cavity of the second-stage middle cylinder. The invention can satisfy the requirement of large magnification ratio of the hydraulic bracket, ensures same thrust of each working cavity and has simple structure.