Clinical operation expander

The utility model belongs to the field of medical instruments for the anorectal department, and particularly relates to a clinical operation dilator. According to the technology, a first circular ring is horizontally arranged, a vertical cylinder is vertically fixed to the top of the first circular ring, at least two expanding and supporting plates are arranged at the bottom of the first circular ring, each expanding and supporting plate is of an arc-shaped plate structure, the expanding and supporting plates form a cylinder structure when combined, the inner side walls of the expanding and supporting plates incline inwards, and a movable rod is fixed to the upper end of each expanding and supporting plate; the upper end of each movable rod is hinged to the bottom of the first circular ring through a hinge seat, a distraction ring is horizontally arranged in the distraction plate, the outer side wall of the distraction ring abuts against the inner side wall of the distraction plate, and a driving assembly use