The invention relates to a tool used for preparing screw channels for a
pelvis crista iliaca
external fixator. The tool used for preparing the screw channels for the
pelvis crista iliaca
external fixator comprises a hollow sleeve I, a hollow sleeve II, a hand cone and a detecting rod, wherein sawteeth contacted with the surface of crista iliaca is arranged at the lower end of the hollow sleeve I, the hollow sleeve I sleeves the hollow sleeve II, spines penetrating
sclerotin of the crista iliaca are arranged at the lower end of the hollow sleeve II, the hand cone is inserted into the hollow sleeve II, the
sharp point of the hand cone extends out from the lower end of the hollow sleeve II to puncture
bone cortex of the crista iliaca and then penetrate
cancellous bone, so that openings of screw channels are formed, a blunt end tip is arranged at the lower end of the detecting rod, the openings of the screw channels are inserted into the deep part of iliac
cancellous bone, and after the screw channels are formed, the spines at the lower end of the hollow sleeve II are knocked into crista iliaca
sclerotin at the periphery of the screw channels and can be used for maintaining the directions of the screw channels. The tool used for preparing the screw channels for the
pelvis crista iliaca
external fixator integrates opening, positioning, forming and direction maintaining of the screw channels into a whole, the screw channels for the pelvis crista iliaca external fixator are simoly and conveniently prepared, and
radiation exposure on a patient and persons in a
surgery group is reduced.