Installing tool for breast bone folding fixator

The utility model discloses an installing tool for a breast bone folding fixator. The installing tool comprises a rack and two expanding arms which are arranged on the rack in a sleeved mode. Each expanding arm is provided with a non-return mechanism through which the movement of each expanding arm relative to the rack can be limited, one expanding arm is provided with a driving mechanism for driving the expanding arm to move relative to the rack, and the bottom of each expanding arm is provided with a positioning boss and a fastening screw both of which are in a set and can be matched with the breast bone folding fixator. The installing tool can position and fasten the breast bone folding fixator, the breast bone folding fixator can evenly fix the breast bone, the elasticity is controllable, the operation is convenient to carry out, and the fixation is stable.